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Full text of "The geology of the Queenstown subdivision, western Otago division"

NEW ZEALANJ) GEOLOGICAL SUKVEY. 3^^' 

(J. M. BELL, Director.) A^^ 

|r,0 



#1 



BULLETIN No. 7 (New Series). 



THE GEOLOGY 



QUEENSTOWN SUBDIVISION, 

WESTERN OTAGO DIVISION. 



JAMES PARK, F.G.R., 

PhOKRSSOR of Ari'LlKD GKOr.OQY IN THK UnIVRKSITY of OtACJO, and DiKKCTOl! OF 

TIIK OtAGO S( HOOL OF MiNES. 



ISSURI) L'NnRIC THE AUTHORITY OF THE HON. R. HoKENZIE. MISISTKK OK MINES. 




NEW ZEALAND. 
BY AUTHORITY: JOHN MACKAY, (iOVERNMENT PRINTER, WELLINGTON. 

1909. 



PLA'J^K I 




Photo P. .\/(i/l(j/i(iii.] 



(.^'UEENl^TOWX, WITH THE 1\ I•:JJ.\liKABLE^^ IN THE BACKliKOUNU. 



liuUv.tln No. 7.] 



[Frontispiece. 



To ax:xx:'rnpariy BLtlietin N^ 




TOPOGRAPHY OF THE 

ARROW WATERSHED 

ABOVE MACETOWN 



Scale of Chains 

80 «0 O 90 

I t-i i-i i-< i- i ^- 



REFEftCNOE 

Dray Roads. ^^-^^ 
Bridle Paths = . 



Field work by t.F. Roberts 
nder direction of Jama Park 



By <(<i(Aor/t|f . ilkn Maoiay. Beutrnmtnt Print 



To ctcccmpcu^ BuJi^tin N" 7. Qtceenstcwrt Sithdiviswrv, Western OUx^c Division' 



Goldbum 
Scantan Cr. ' 




/_ Sea Level 



Miocene Band 



Lake Wakatipu 



Soho Survey District 



Skippers Creek Survey District. 



The Coronet 
Trij G 



Bron Peak 



Shotover Survey District. 



Mid-Wakatipu Survey District. 



MiSf.JusC 






By Authority : John Haokay, Oavernment Printor. 



SECTIONS IN QUEENSTOWN SUBDIVISION 



BO 40 



Scale of Chain s — 

o 60 



Reference to Geological colours 

PLE.ISTOCENE MIOCENE PALEOZOIC 



bCoveWlarine Beds. KakanuiSeries Maniototo Series 



Low'Iirra£e SiohTerrua: Sandstone, „ ct.* r olj 

Srayots. Qr^.U Umtstorvo^c^ Upper Schists lower So>usts 




JAMES MACKINTOSH BELL 
DIRECTOR 



izsoja/oB.aza 



To cu:t:crrip€in\' BuU-etirt A'- 7. QiLC^nsUi^vn Subdiviswn.Wcsteryi OtcufcDixis 




By Authority John Mackay. Go< 



Tc dcccmpany BulUtin N" 7. QiLeenstc^vn Subdlvisu>rv,Westcm Otci^o Division. 
E A R JSr S Z A W 




tn Authorlit^ J«l.n Mai 



To accompany Buli^tin N- 7, QicecnsUywn SitbdivLsiofi',WesterrvOtaxfcIKvisicJv. 






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n 



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^ DD Mt Marsdef' 
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Saddle ;l235o' ""^Z / rTli' 

f ^ ^Ji.fll "^1 Coronet I- - 



» 



^^c 



■••^1 















yScfj/st flat or gently undulating or 
-■Triclined to Southward at S -10 with . 
Eat:t and West Joints dipping nat. 70'-7S 



The Coronet Une^ 



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Slope Hill 
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ARTHUR'S Ppll 



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Ferry 
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iForHftcation Hill 



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vQueenstown Hill 



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GEOLOGICAL MAP OF 

SOEVEY DISTRICT 



.V3«-^ 



Umtm hy G. KBarri^ . JiJy 1308- 



JAMES MACKINTOSH BELL 



^^=- General Jteferenc e = — 

Roods and Tracka - /Au« ^^=t=^ === = 

T^^. Station. J 

W»tt^li<u:es „ - !P— jT 

Outcrops with observad strike end dip ^ 



Qedlogy "by James Sivh 
TapoaTm!?LLcal data- sitppUed. nuxirJy 
by (Ae Lionds and. Survey Department. 



- Scale of Chains - 



I l-l l-H 



Reference to Geological colours 

RECENT pleistocene: PALEOZOIC 

Newer Older Maniototo Serie$ 

^ EH) □ □ □ 

Xodes. BLYerBedjs Lo» lermce mgKTkmice^'^dB LowerScJu^ts Old. WorHnga 

{^ravels QlactalDrift 



To ucccmpcmv BulUtin N" 7. QtLeenstcvt-Tt Sub€ivvi^icn .Western OtaqcDii'tsion. 




GEOLOGICAL MAP OF 



«MMPi m^'. 



\mm 



JAMES MACKINTOSH B£LL 



Reference to Geological coioure 



RECENT Pi_EI*TOCENt 



^Gvnertd Jieference = 



Rtiaiiji ami Tracka .. 



Outcrops with observed strike and dip /, 



Newer Older Bobb Cove Manne Beds Kakanur Series Maniototo Series 

lodes Ibu/efBeds-LoyvTe^rrace BigyiTerram SoindstorLdun^utint. Upper Sdi2.sC3 Lcrrver- Schists OidWoriunffs 

Qnivels Qravels Muiy dnyz , ^ uir, glomerate 



Geology by Jdntea Jhrk: 

Tbpoffra^zcaL data. rnaXnly sufjpHjed^'by the 
Lands and. Survey DuprutrnenC. wUh, a/id.- 
■ Uio'T^s by ffffumtit/in wzder ./a^nes J'ark's 
diJ-eclion, 



- Scale of Chain s - 



I I— I ^^~ 



Druv/rL by GEHar-r\s.Jidyi908. 



Ill 



LETTEE OE TRANSMITTAL 



Geological Survey Office, 

Wellington, 10th February, 1909. 
Sir,— 

I have the honour to submit herewith Bulletin No. 7 (new 
series) of the Geological Survey Department. 

The bulletin covers a report on the geology of the Queeustown 
Subdivision, Western Otago, by Professor James Park, who was em- 
ployed temporarily for live months during the lield season of 1907-8. 

It contains 112 pages of letterpress. It is illustrated by thirty- 
eight plates and by thirty-three figures scattered throughout the text. 
There are also thirteen maps and plans and one sheet of geological 
cross-sections. 

I have the honour to be, 

Sir, 

Your obedient servant, 

J. M. BELL, 

Director, Geological Survey. 
Hon. K. McKenzie, 

Minister of Mines, 

Wellington. 



CONTENTS 



Letter of Transmittal 



Page 
iii 



Chaptee I. — Introduction. 



General Description of District 
Seoije of the Work 
General Geological Features 



Mountains 

Wakefield Range 

Maciindrew Mouiitaim> . . 

Richardson Mountains . . 

Eyre Mountains 
Origin of Mountain-chains 
Rivers and Valleys 

Kawarau River 

Shotover River 

Arrow River . . 
Lakes . . 

Lake Wakatipu 

Origin of Lake Wakatipu Basin 
Glacial Lake Wakatipu 

Like Hayes 

Moke Lake 





Page 




1 1 


Previous Geological Work 


3 


Literature 


4 


Acknowledgments 


Chapter II. — 


E*HVSIOGRAPHY. 




. 8 


Lakes — conlin tied. 




8 


Lake Kilpatrick 




9 


Lake Jolinsou . . 




. 10 


Lake Dispute . . 




. 10 


Lake Luna 




. 10 


Great Faults 




. 12 


^\rrow Fault . . 




. 12 


Soho Fault 




. 12 


Shotover Fault 




. 13 


Moonlight Fault 




. 14 


Queen-stown Fault 




. 14 


Kawarau Fault 




. 15 


Flora . . 




. 1() 


Climate 




. 17 


Table of Heights 



Page 
5 
5 

7 



18 
18 
19 
19 
20 
20 
20 
20 
21 
21 
21 
21 
22 
23 



18 



Chaptkr IIL — Glaciation. 



Extent and Character of Glaciation 


, 


. 25 


Rock-huniniocks, or Roches Moutoniiies 


. 2« 


Glacial Till 




. 20 


Origin of Glacial Till 






. 27 


Erratics 






. 28 


The JIacetown Erratic 






. 28 


lSkipi)er's Point En'atic 






. 29 


Perched Blocks . . 






. 29 


Moraines 






. 30 


Queenstown Eskar 






. 30 


The Wakatipu Glacier 






. 31 


Ice-terraced Mountain-slopes 




. 31 


Lake Luna Ice-benches 




. 31 


Mammillated Slopes of Coronet Range 


. 32 


Glaciated Remarkables 


, 


, 


. 32 



Ice-terraced Mountain-slo|)es — coiUinutd. 

Ice-benching on Concave Slopes . . . . 32 

Ice-cut Platforms . . . . . . 32 

Striated Surfaces, and Direction of Stria? . . 33 

Sloiie and CVag . . . . . . . . 34 

Thickness of Ice-Hheet . . . . . . 35 

The Motion of Glaciers . . . . . . 36 

The Excavating-power of Glaciers . . . . 38 

The Northern Limits of Ice-sheet .. ..40 

Age of New Zealand Glacial Period. . . . 41 

The Cause of the Glacial Period . . . . 41 

Henley Boulder-clay . . . . . . 43 

Outcrop Curvature . . . . . . 43 

Exfoliation of Striated Skin of Erratics . . 43 



Rainfall a National .4sset 
Gauging of Kawarau River 

Statement of Depth and Velocities 



Chapter IV.— Hydrology. 

45 (Jauging of Kawarau River — continued. 

. . 46 Development of Power at Falls . . . . 48 

. . 46 I Discharge of Smaller Rivers and Streams . . 48 



VI 



Chapter V. — Bathymbtrical Suevey of Lakes. 



Greneral Procedure 
Lake Hayes 
Lake Johnson 



Page 
50 
50 
50 



Moke Lake 

Lake Kilpatrick . . 

Lake Wakatipu . . 



Page 
51 
51 
.51 



Chapter VI. — Genbbal Geology. 



Table of Formations . . . . . . 54 

Maniototo Series . . . . . . 54 

Distribution . . . . . . . . 54 

Rocks . . . . . . 55 

Disposition and Thickness of Strata . . 56 

Petrology of the Schists . . . . 57 

Foliation of the Schists . . . . . . 58 

Origin of the Schists . . . . . . 58 

iletamorphism of the Schists . . . . 58 

Relationship to Underlying Formation . . 59 

Age of the Schists . . . . . . 59 

Eruptive Rocks . . . . . . 59 

Economic Minerals . . . . . . 59 

Kakanui Series . . . . . . . . 59 

Distribution . . . . . . . . 59 

Rocks . . . . . . . . 59 

Relationship to Underlying Fonnation . . 60 

Relationship to Overljing Formations . . 60 

Age of Kakanui Series . . . . . . 60 

Eruptive Rocks . . . . . . 60 

Economic Minerals . . . . . . 60 



Lower Miocene : Oamaru Series . . . • 60 

Table of Beds . . . . . . . . W) 

Involvement in Schists . . . . . . 01 

Depth of Involvement of Tertiaries . . 63 

The Warping of Tertiaries at Bob's Cove . . 65 

Thickness of Tertiary Beds . . . . 66 

Fossil Contents . . . . . . 66 

Age of Marine Series . . . . . . 67 

Economic Value . . . . . . 67 

Pleistocene . , . . . . . . 67 

Calcareous Ooze at Lake Hayes . . . . 68 

Character of Erratics . . . . . . 69 

Petrology of Crystalline and Igneous Rocks 

in Fluvio-glaoial Drifts . . . . 69 

Hornblende-lamprophyres . . . . 69 

Saxonite (Hartzbergite) . . . . 70 

Norites . . . . . . . . 71 

Hornblende-diorites . . . . . . 72 

Hornblende-syenites . . . . . . 72 

Granites . . . . . . . . 73 

Recent . . . . . . . . . . 73 

River-beds, Alluvial Flats, Swam])s, &c. . . 73 



Chapter VII. — EcoNOjnc Geology. 



Introdiiction 
Quartz-mining 

Economic Possibilities . . 
Gold-bearing Lodes 

Summary of Characteristics 
Gold-bearing Lodes in JIacetown District 
Sunrise Mine 
Tipperarj' Mine 
Killamey Line of Lode 
Dublin Lode 
Anderson's Lode 
Sylvia Lode 
Arrow Lodes . . 
Alpha Lode . . 
Gamma Lode 
Delta Lode . . 
Iota Lode 
Zeta Lode . . 
Lambda Lode 
The Pyritic Lode 
Criterion Lode 
Cornish Lode 
Columbia Lode 
BuUendale Lodes 

Achilles Mine (Old Phoenix) 
Skipper's Point and Shotover Lodes 
Shotover Consolidated Mine 
Peat's Lode 



74 


Gold-bearing Lodes — continued. 






74 


Skipper's Point and Shotover 


Lodes — con- 




74 


tinned. 






75 


Junction Lode No. 1 


. . 


89 


75 


.Junction Lode No. 2 


. . 


90 


76 


The Bridge Lode 




91 


79 


Lodes in Stevenson's Claim, Skipper's 




79 


Point 




92 


79 


Euieka Lode 




94 


79 


Skipper's Gorge Lode 




94 


80 


Scheelite 




94 


80 


Copper . . 




94 


80 


Moke Creek Copper Lode 




94 


81 


Skipper's Point Copper Zone 




95 


81 


Antimony 




95 


82 


Advance Peak Lode 




95 


82 


Skipper's Point Antimony 




95 


82 


Alluvial Mining . . 




95 


82 


Terrace-gravels 




96 


83 


River- and Stream-bed Wash 




97 


83 


Lake Hayes Limestone 




97 


84 


Bob's Cove Limestone 




99 


84 


Bob's Cove Marl 




100 


84 


Coal .. .. 




100 


84 


Building-stones . . 




101 


86 


Altered Greywacke 




101 


86 


Bob's Cove Sandstone . . 




101 


88 


Bob's Cove Limestone . . 




101 



vn 



Index 



Page 
102 



Tables. 



Table of Heights . . 

Discharge of Smaller Ri\-ers and Streams 

Table of Geological Formations 



23 
48 
54 



LIST OF ILLIJSTKATIONS. 



Plate 

I. Queenstown, with the Remarkables in the Background 

IT. Queeastown Hill from the Domain 

III. Gabled Ridges eroded since Glacial Period 
Looking uj> the Arrow Gorge 

IV. Shotover Bridge on Road to Arrowto\vn 

V. Old Hanging- valley of Arrow River 

Ice-shorn Tor and Crag on Skipper's Rojwl 

VI. On Coronet Range — Road to Skipper's Point 

VII. Shotover Gorge on Road to Skipper's Point 

VIII. Shotover Gorge at Arthur's Point Bridge . . 

IX. BuUendale Creek, .Skipi)er's, showing profound Erosion of Features since Glacial Period 

X. Kawarau Falls — I^ke VVakati)>u 0\itlet 

XI. Moke Lake — Glacial Twin Lake .... 
Lake Dii»pute, looking towards Lake Wakafipu 

XII. Ice-terrace<l Slo[)es of Ben More, looking across I>akp Luna . . 

XIII. Whalcback Mica-schist Ridges and Glacial Eskars near Arrowtown. with L;irge Erratic 

Foreground arid Crown Terrace in Distance 

XIV. Bottom of .\rri)w Cirque, showing Ice-worn Rock-hummocks 
XV. Arrow Eskar in .Middle Distance 

Stony Boulder-clay, Arrowtown 
X\'I. I'lirt ion of Striated Surface of Perched Erratic of Grovwacke near Hogun's Hoad, .-\rr( 
Flat 
Perched Erratic of (Jreywackc. near Hogan's Roail, .Arrow Fliit 

XVII. Ice-striated Boulder of Greywacke, Bob's r.'ove, I^ke Wakatijiu 
lie-striated Erratic of Grcywacke, Bob's Cove, Lake VVakati|iu 

XVIII. Lirge EiTatic Boulder of tJreywacke in Queen.stown Domain 
XIX. Arrow Flat, showing Ice-planed Rock-hummocks 
Queenstown Rskar, taken behind Convent 

XX, Stony Creek Waterfall, at Cro.ssing of Involved Tertiaries 

« XXI. Pig Island, I>nke Wakatipu, ice-shorn into Flat Platform .. .. .. ..) 

Ice-worn and striated Rock-surface, Bob's Cove .. .. .. .. . . [ 

XXII. South End of I^fike Hayes, showing Ice-shorn Hills beyond .. 

XXIII. Ice-polished and Striated Rock-'<urface, Bob's Cove, I>ake Wakatipu . . . . . .\ 

Face of Boidder-clay, showing Rude Stratification, near Fernhill Coal-mine, Green Island, ^ 

Dunedin . . . . . . . . . . . . . . . . ) 

XXIV. Face of Henley Boulder-clay, showing Rude Stratification, at Head of Gully behind Henley 

Hotel 

XXV. Kawarau Falls, showing Ice-worn Slopes of Queenstown Hill in Middle Distance 

XXVI. Sharply Crumpled Mica-schist . . . . . . . . . . . . . . ) 

Herringbone-crumpled .Mica-.schist, Skipper's Creek . . . . . . . . . . / 

XXVII. .Scmi-nietamorphic Mica-schist of the Kakanuian. with Quart/.-laminae, on Road from 
Queenstown to Five-mile Creek 



Facing page 


Frontispiece 


2 


;;; - 


.. 12 


••' 12 

• ■ 1 


.. 12 


.. 12 


.. 12 


., 13 


15 


•■I 18 

• ■ 1 


1!) 


in 


2C, 


2(i 



::1 



30 

30 
30 
30 
30 
33 
34 

42 

43 

48 

58 
59 



VI 11 



riate 
XXVIII. 
XXIX. 



XXX. 



XXXI. 



xxxn. 

XXXIII. 
XXXIV. 

XXXV. 

XXXVI. 
XXXVII. 

XXX vm. 



Geological Sketch-map of Bob's Cove 

(1.) Hornblencle-lani])roi)hyre (Camptonite Type) 

(2.) Horublende-laiiii)ro])hyre 

(3.) Honiblciule-lampropliyre (Camptonite Ty]ie) 

(4. ) Hornblende-lainprophyre 

(1.) Granite 
(2.) Granite 
(3.) Granite 

(1.) Norite 

(2.) Norite 

(3. ) Hornblende-syenite . . 

(4.) Homblende-diorite . . 

Summit of Mount Aurum, from West Side 

Advance Peak, near Macetown 

Skipper's Point Bridge and Gold-workings, Shotover River . . 

Upper Shotover Valley . . 

Lake Wakatipii, ^vith the Dome of Mount Nicholas in the Distance 

Mount Aurum, looking up Skipper's Creek 
Shotover Valley 

Plan and Cross-section of the Bridge Lode, Skipper's Creek . . 

Lens of Quartz in Vein on Bank of Skipper's CVeek, 50 yards above Footbridge 

Quarry of Calcareous Ooze (limestone), South-east End of Lake Hayes 



Facing page 
6.") 



72 



1 72 
1 

72 

I 80 
80 
80 

80 

92 
92 
98 



FIGURES. 



No. Page 

1. Showing Disposition of Mountain-chains . . . . . . . . . . . . . . !) 

2. Showing Mountain-chains and Faults in the Arrow, Shotover, and Wakatipu Valleys . . . . 11 

3. Section across Shotover Valley, showing High-level TeiTace-gravels lying on Floor of old (41afial 

Channel . . . . . . . . . . . . . . . . . . ..13 

4. \ Showing the Resent Form of Lake Wakatipu and of tlie Glacial Lake resi>cctively, on a scale 

5. j of 12 miles to an inch . . . . . . . . . . _ . . . . . . 17 

6. Showing Longitudinal Section of Lake .Johnson, with Rock Rim and (iravel Barrier . . . . 19 

7. Diagram showing Crown Terrace Rock Platform, Arrow Flat, and Lake Hayes Basin . . . . .33 

8. Section showing Ice-striated Rock-surface near Bob's Cove, looking down Gulch towards Lake 

Wakatipu . . . . . . . . . . . . . . . . . . 34 

9. Plan showing Differential Surface Flow of a Glacier . . . . . . . . . . 37 

10. Longitudinal Section showing Differential Flow of Glacier as between Surface and Bottom . . 37 

11. Showing Strips and References used in computing the Discharge of Kawarau River ... .. 47 

12. Section near Bob's Cove, showing Wedge of Miocene Breccia-conglomerate involved in Schist, 

6.5 ft. thick . . . . . . . . . . . . . . . . . . 61 

13. Section at Stony Creek, showing Marine Tertiaries interbedded with the Palaeozoic Schists . . 62 

14. Section showing Marine Tertiaries interbedded with Palaeozoic Schists at Stonv Creek, near foot of 

Mount Gilbert .. .. .. .. .. .. ".. .. ..63 

15. Section at Stony Creek : Tertiary Beds involved in Schists . . . . . . . . . . 64 

16. Section from Bob's Cove towards Twelve-mile Creek, showing involved Miocene Tertiaries . . 65 

17. Section across Limestone Ridge at Bob's Cove, Lake Wakatipu . . . . . . . . 65 

18. Sectional View of Sylvia Lode, Bush Creek, Macetown District .. .. .. ..80 

19. Cross-section of Alpha Lode, near Arrowtown . . . . . . . . . . . . 81 

20. Cross-section of Gamma Lode, near AiTowtown . . . . . . . . . . . . 81 

21. Cross-section of Iota Lode, .Arrow Gorge, near ArrowtowTi . . . . . . . . . . 82 

22. Cross-section of Pjrritic Lode, Shadrach Creek, Arrow Gorge . . . . . . . . 83 



IX 



No. 

23. Cross-section of Peat'.s Lode, in Fiospeotinu-hole, Sliotovff River 

24. Diagrannnatii- Section showing Rclationshii) of Junction Lodes, Skipper's Point. . 

25. Cross-section of Jiiuetion Lode Xo. 2. near Mouth of Skipper's Creek, Shotover 

26. Enlarged Sectional \'iew of Junction Lode No. 2, Skipper's Point, Shotover 

27. Section showing Relatioiisliip of Junction Lodes Nos. I and 2, Skipper's Point, Shotover 

28. Plan showing No. 1 Lode^and its Branch Veins, Stevenson's Claim, Skipjjer's Point 

29. Cross-section of No. 2 Lode, Stevenson's Claim, Skipper's Point 

30. Cross-section showing Relationship of Stevenson's Lodes Xos. 3, 4, and 5, Skipper's Point, 

over 
31.' Cross-section of Cupriferous Schists, Jloke Creek, looking Northward . . 
32.' Section showing Deposit of Limestone at South-east Comer of Lake Hayes 
33. Section showing Face of Reid and McDowell's Limestone-deposit at South-west Angle of 

Haves 



Shot 



Liike 



Page. 
89 

9() 
90 
91 
91 
92 
93 

93 

95 

98 

98 



MAPS AND PLANS. 



No. 
1. Map of New Zealand, showing Divisions and Land Districts 

2. Map of Western Otago Division, showing Survey Districts and Area geologically surveyed 

3. Map showing Direction of Flow of Queenstown Pleistocene Glaciers, also Major Faults of Queens 

town Area 

4. Plan and Cross-sections of Kawarau River 

5. Contour Plan of Lake Hayes 

6. CTOfts-sections and Longitudinal Section of Lake Hayes 

7. Contour Plan and Sections of Lake Johnson 

8. Contour Plan and Cross-sections of Moke Lake 

9. Geological Map of Mid-Wakatipu Survey District .. 
10. ,, ,, Shotover Survey District 
IL „ .. Skipper's Creek and Soho Survey Districts 

12. „ Plan of Skipper's Point .Alluvial Goldfield 

13. Topo2Ta)>hv of the Arrow Watershed alK)ve Macetown 



Facing page 

z 



20 
47 
52 
52 
52 
52 
In ])ocket 



GEOLOGICAL SECTIONS. 



Sheet of Sections : — 

(I.) Section along Line CD, Soho Survey District 
2.) „ „ AB, Skipi)er's Creek Survey District 

(3.) „ „ KK, Shotover Survey District 

(4.1 „ „ AB, Wid-Wakatipu Survey District 



In pocket. 



ii — Queenstown. 




By Authority : John Mackay, Gcvemmtnt Pnnttr. 



i2Ao.fe.os.iOiS- 




MAP OF 

WESTERN OTAGO 

DIVISION 

SHOWING SURVEY DISTRICTS 

ENGLISH MILES 



Districts dealt with in BuZLetin NS J col.ou.red thus | | 
„ „ „ — „.j)revioiLS buZletirb .„ . . 



00 (07* 



BULLETIN No. 7 (NEW SEHIES) 



THE GEOLOGY 



OF THE 



QUEENSTOWN SUBDIVISION. 

WESTERN OTAGO DIVISION. 



CHAPTER I. 



INTRODUCTION. 

Page Page 

General Description of District . . 1 Previous Geological Work . . 5 

Scope of the Work . . .3 Acknowledgments . . . . . . 7 

General Geological Features . . 4 

General Description of District. 

The area forming the theme of this report embraces within its limits the high raoimtainous 
region drained by the Shotover and its large tributaries — Skipper's, Moonlight, and Moke 
creeks — and by the Arrow River and its tributary the Goldburn. It extends from Macetown 
and the upper Arrow across the mountains to the Shotover Valley, whence it stretches west- 
ward to the sources of Sknpper's Creek near Mount Aurum, and southward to Lake VVakatipu. 
From Queenstown it follows the shores of Lake Wakatipu to the Twenty-five-mile Creek, 
and reaches across the lake to the Eyre Mountains. Included within its boundaries are the 
survey districts of Mid-Wakatipu, Shotover, Skipper's Creek, and Soho. 

Queenstown, with some seven or eight hundred inhabitants, is the county town and chief 
centre of population in the district. It is picturesquely situated on the raised lake-beaches 
and great moraine overlooking Queenstown Bay and Frankton Arm. Its scenic marvels 
and sunny salubrious climate have made it the chief centre of the tourist traffic in the South 
Island. It is easily accessible from Dunedin by train and steamer, a day's journey ; from 
Invercargill by train and steamer, a day's journey : from Dunedin by the Otago Central 
route, by train to Clyde and thence by coach, a two-days' journey ; or from Dunedin, via 
Clyde, Cromwell, and Lake Wanaka, a three-days' journey. 

To those in search of health Queenstown is bright and invigorating, while to the enter- 
prising holiday-seeker it affords plenty of scope for the display of activity in boating, walking, 
or mountaineering. The carpet of gentian, snowberry, and other native plants makes the slopes 
of Ben Lomond and Queenstown Hill especially beautiful and attractive in the months of 
January, February, and March. The autumnal tints of the foliage of the deciduous trees 
around Queenstown can only be described as marvellous and inimitable, being unapproached 
1 — Queenstown. 



by anything the writer has seen in Great Britain or in an}' other part of the Dominion. The 
stately poplars in particular, with their glorious tints of pure chrome, stand up like shafts 
of gold against the sombre green of the native vegetation. They are a feast to the eye, and 
alone are worth a journey to the cold-lake region. Needless to say the mountains are seen 
at their best in winter — that is, from June to September — when covered with their mantle 
of snow. The following graphic description of this pleasant place is culled from the pages 
of a small pamphlet issued by the New Zealand Tourist Department : — 

" Queenstown, besides being the centre from which many very tine scenic routes radiate, 
is a charming little retreat for a quiet holiday. It is one of the healthiest places in the colony, 
and its altitude (about 1,020 ft. above sea-level) and pure, dry, invigorating moiuitain air are 
important factors in its advantages as a natural sanatorium. As a winter resort for invalids 
suffering from affections of the lungs, Queenstown has the recommendation of many 
physicians. In the winter season the rainfall is small ; snow rarely lies for more than one 
or two days ; the atmosphere is calm, the nights frosty, and the days clear, bright, and 
warm. The summer climate has been likened to that of Northern Italy. Grapes, peaches, 
and other fruit requiring summer heat readily ripen in the open air. 

" Unlike many New Zealand townships, Queenstown has a restful old-fashioned air, and 
its wdnding roads afford some charming walks. The Esplanade, curving round the white 
beach, is shaded by weeping-wallows, and on the seats beneath the trees the visitor may 
leisurely enjoy the long summer evenings, or on his " lazy days " admire the changing tints 
on lake and crag, and watch the trout in the beautifully clear water, through which they 
may be seen as through a glass, outlined against the silver sands. 

" The Queenstown Park, planted with tall eucalypti and pines, and English and native 
trees, adjoins the town on the south, where the olden Maori village Te Kirikiri once stood. It 
is a long, green peninsula, its slopes strewn with ancient moraine rocks, now fast being covered 
with climbing trailers. Queenstown Bay, viewed from here, is an enchanting picture, with 
the white village and the green woods and mountains all reflected perfectly in its surface. 
Along the waterside may be seen specimens of the flowering kowhai, covered in the early 
spring with golden blossoms. In the middle of the park, on the summit of the peninsula, is 
an ornamental lakelet, which in winter time is sometimes frozen hard enough for skating. A 
bowling-green has been laid down for the use of visitors. Many a pleasant hour may be spent 
in the park, and none more full of quiet enjoyment than in the calm evening-time, with the 
Remarkables and Mount Cecil and the turreted Walter Peaks full in view, bathed with exquisite 
sunset colours. 

j" Just at the back of the town is Queenstown Hill (2,958 ft.). There is a comfortably 
graded path to the summit, from which there are magnificent views of the lake, the 
Remarkables, the Crown Ranges, the green valley of the Kawarau, and the gorge of the 
Clutha. The climb, at an easy pace, occupies about three-quarters of an hour. 

" Another favourite walk is to the Waterworks (time, twenty minutes each way), in a 
picturesque wooded valley about a mile from the town. The Ben Lomond Track above the 
Esplanade is followed until finger-posts show where the path diverges. 

" Westward of the town a good road along the margin of the lake for several miles 
affords a charming walk or drive (half a day) as far as the ' Five-mile ' Creek. If a whole 
day is to be spent. Moke Lake may be visited on foot from the road. The distance to the 
' Five-mile ' is in reality considerably less than five miles,, but the creek was named, like 
the ' One-mile ' and ' Two-mile,' by the gold-diggers who had to fight their way through thick 
scrub and bracken around the trackless shores." 

The Frankton or Kawarau Flat extends from the head of Frankton Arm to the mouth 
of the Shotover without a break, and beyond the Shotover reaches to the end of Lake Hayes. 
Between the Shotover and Arrow there lie the Arrow Downs, mostly in a state of high culti- 



vation. The Crown Terrace is a wide rock-shelf some 700 ft. or 800 ft. above the level of the 
Arrow. It lies between the Arrow and the foot of the Crown Eange, and is occupied by manv 
prosperous farms. 

There are no wide valleys bounded by undulating foothills, as are to be seen at Cromwell 
and Bannockbuni. The Shotover and Arrow rivers, with their numerous tributaries, traverse 
narrow rocky gorges bounded by high mountains that possess in most places excessively steep 
slopes. 

With the exception of the Crown Terrace, the Arrow Downs, and Frankton Flat, altogether 
less than fifty square miles in extent, and the narrow gorge-like valleys mentioned above, the area 
under review is occupied by a sea of high mountain-ranges and narrow ridges. Thus, north of 
the Arrow are the Crown Range, culminating in the Crown Peak, 5,673 ft. above sea-level ; the 
Motutapu Range, with Mount Soho, 5,74.3 ft., forming the diNade between the Arrow and Motu- 
tapu ; the Macandrew Mountains, with Mount Hyde, 6,790 ft.. Mount St. Just, 5,631 ft., Advance 
Peak, 5,700 ft., and Vanguard Peak, 5,799 ft., lying between the Arrow and Shotover ; and the 
Richardson Mountains, with Mount Aurum, 7,315 ft.. Mount Larkins, 7,432 ft.. Mount Hamlet, 
7,200 ft., Mount Gilbert, 5,755 ft., Mount Crichton, 6,185 ft., and Ben Lomond, 5,747 ft., 
forming the divide between the Shotover and Lake Wakatipu ; and the Eyre Mountains on 
the south side of the lake, culminating in Walter Peak, 5,916 ft., and Cecil Peak, 6,477 ft. 

Scope of the Work. 

The work undertaken during the summer of 1907-8 included an investigation of the con- 
figuration and physical features of the land, special attention being paid to the evidences of 
former glaciation ; of the rock- formations and general geological structure ; of the nature and 
extent of the gold-bearing alluvial drifts ; of the gold-bearing lodes at Macetown, Skipper's, and 
Arrow ; and of water-supply. In connection with the latter, gaugings were taken of the 
Arrow and Shotover rivers and their numerous tributaries. The Kawarau River was also 
gauged by the measurement of three cross-sections at points about half a mile below the Falls, 
and by systematic velocity-determinations. At the same time a graduated gauge was fixed 
in the river in terms of a carefully determined datum, and arrangements made for daily 
readings to be recorded from now onward for all time. 

During the progress of the work a bathymetrical survey was made of Lake Hayes, Moke 
Lake, Lake Johnson, and Lake Kilpatrick ; and numerous barometric altitudes were recorded, 
and in most cases checked by subsequent readings, in order to obtain results with a reason- 
able degree of accuracy. 

The courses of the rivers and streams, and the positions of such fixed points as trigono- 
metrical stations, shown on the accompanying maps, were obtained from the excellent district 
sheets of the Lands and Survey Department. But where discrepancies of much moment 
occurred the streams were carefully resurveyed, the traverses being tied on to trigonometrical 
points wherever available. In this way the whole of the Upper Arrow and all its branches 
were measured and observed, and plotted on a scale of 40 chains to the inch ; and much work 
of this kind was undertaken at Moke Creek, the Twelve-mile Creek, and Skipper's Point. 

The report is illustrated with general geological maps and sections of the Soho, Shotover, 
Skipper's Creek, and Mid- Wakatipu sur\ey districts, a special topographical map of the Upper 
Arrow and Macetown district, a special large-scale map of Skipper's alluvial goldfield, special 
plans and sections showing the bathymetrical surveys of Lake Hayes, Moke Lake, Lake Johnson 
and Lake Kilpatrick, and special plan and sections of the gauging of the Kawarau River 
Besides these the report is illustrated with numerous photographs and sketches showing the 
general character of the country and the e^■idences of glacial erosion that are everj'where so 
conspicuously impressed on the landscape. Minor rock-structure and vein-formation are 
shown by diagrams scattered throughout the text. 
1*— Queenstown. 



The general geological maps are printed to a scale of one inch to the mile, and, as in the 
author's maps of the Alexandra and Cromwell districts, the amount of detail introduced is 
what was considered necessary to bring out clearly the distinctive features of the geological 
structure. 

The opportunity to show detail with an approach to exactitude is necessarily greatest on 
large-scale maps. For this reason the special maps of the Skipper's and MacetowTi goldfields 
are not mere enlargements of portions of the general maps. 

The sections of the one-mile maps are drawn to natural scale, and on these there is 
unavoidable supj^ression by superficial deposits. They are always drawn looking towards 
the north, north-east, or north-west. 

General Geological Features. 

The prevailing rock in the eastern portion of the district is a soft crumbling mica-schist 
which is conformably followed by a series of less-altered micaceous rocks, consisting in its 
upper members of altered greywacke and claystone. The lower and more highly altered 
schists belong to the Maniototo Series, and the less-altered upper rocks to the Kakanui 
Series. 

The lower schists are distinguished by the presence of numerous bands of chlorite-schist, 
some of which widen out to extraordinary dimensions in a very short distance. 

Bands containing chlorite and chloritoid matter occur sparingly in the lower portion of 
the Kakanui sub-schists, but they are commonly thin, and seldom continuous for a great 
distance. At Bob's Cove, on the north shore of Lake Wakatipu, there is a small patch of 
curiously bent and twisted Miocene marine strata, and from that place there runs a narrow 
wedge-shaped band of the same Tertiary Series, crossing the mountains to the right branch 
of the Upper Shotover, being involved along the axis of a great overfold. On \aewing this 
deeply involved bed of fossiliferous Miocene conglomerate on the craggy heights of the 
Richardson Mountains, the mind travels at once to the wedge of Nummulitic Umestone, 
similarly entangled in the Malm, below the peak of the Silberhorn, in the Bernese Oberland 
of Switzerland. 

One of the important geological features brought out by the author's work in the Cromwell 
region during the preceding summer was the apparent thickening of the Maniototo schists 
in proceeding westward from the Dunstan Mountains towards the Arrow and Shotover. The 
apparent thickening in a distance of some thirty miles was from 12,000 ft. to 30,000 ft., and 
the problem that remained to be solved was the part played by overthrust-folding in the 
apparent increase of thickness. 

The work of the past summer has more than confirmed the apparent increase of thickness 
of the Maniototian, and has furnished conclusive proof that the increase is due to overthrust- 
folding that has been accompanied by horizontal and vertical displacements along thrust-planes 
running more or less parallel wdth the strike of the rocks. The course of these overturned 
folds of schist is marked by the entanglement of wedges of Pliocene lacustrine beds in the 
Kawarau district,* and of Miocene Tertiaries in the area under review. 

The point of greatest scientific interest in this report is the presentation of proof that the 
Lake Wakatipu region was covered by a continuous ice-sheet of vast depth in the Pleistocene 
period — a continental ice-sheet that reached to the sea, and probably covered the greater part 
of the South Island. There is abundant evidence that the glaciation of New Zealand in the 
Pleistocene attained a degree of magnitude not exceeded in any part of the Northen Hemisphere. 

The chains of glacial lakes, the ice-grooved and mammillated slopes of the mountain- 
ranges, in places terraced to 6,000 ft. and over, the perched erratics, the extensive rock-striation, 

* J. Park. BuUetinjNo. 5 (New Series), N.Z. Geol. Survey, 1908, pp. 19, 71, 72. 



the widespread glacial till — all attest a period of intense refrigeration and prolonged 
glaciation. 

The ice-sheet at the time of maximum refrigeration had a thickness exceeding 7,000 ft. 
in the Wakatipu basin, forming a vast plateau, above wliich only the higher peaks appeared 
like strings of rocky islets in a frozen sea. The existence of a large proportion of foreign 
material in the till, eskars, and moraines affords graphic and unmistakable evidence of the 
direction of flow of the ice. 

Another point of geological moment is the proof of the comparative youth of our 
mountains, as shown by Uie entaiiglement of Miocene and Pliocene strata along the major 
faults that run along the axes of the great mountain-chains. 

The points of chief economic interest are centred in the development of the gold-bearing 
lodes at Macetown, Arrow, and Skipper's, in the distribution of the alluvial drifts at these 
places, and in the utilising of water for irrigation and for the generation of power. 

Previous Geological Work. 

So far as can be ascertained, the pioneer geological work ot Central and Western Otago 
was that of Dr. Charles Forbes,* of the Admiralty surveying-ship " Acheron," who, hi his paper 
" On the Geology of New Zealand, with Note on its Carboniferous Deposits," made pertinent 
reference to the geological structure in that region. That was in 1855. 

In 1862 Dr. W. Lauder Lindsay discoursed ui Dunedin on the mica-schists of Otago, and 
in the next decade or so there followed papers by Sir James Hector, Mr. James McKerrow, 
Mr. L. 0. Beal, Captain Hutton, and others dealing with the origin of the lake-basins, former 
glaciation, the origin of the allu\nal drifts, and cognate matters. A list of these papers, and 
of others that bear more or less directly on the Western District of Otago, is enumerated 
below : — 

1. " On the Geology of New Zealand, with Note on its Carboniferous Deposits." Charles 

Forbes. 1855. 

2. " On the Geology of Otago." W. Lauder Lindsay ; lecture in Dunedin^ 1862. 

3. " On Mining in New Zealand." James Hector. Trans. N.Z. Inst., vol. ii, 1869, p. 361. 

4. " Notes relative to the Geology of the Manuherikia Valley." James Hector. Otago 

Prov. Gov. Gaz., 85, Sept. 3, 1862. 

5. " Report of Progress of Geological Survey of Otago since 15th April, 1862." James 

Hector. Otago Prov. Gov. Gaz., 217, 1862. 

6. " Geological Explorations to the West Coast of Otago, New Zealand : Report, with 

Appendix of Meteorological Observations taken on the West Coast of Otago." James 
Hector. Otago. Prov. Gov. Gaz., 435, Nov. 5, 1863. 

7. " Departmental Report of the Geological Survey of Otago ' ; I3th April, 1864. "Report 

on the Coals of Otago and other Parts of New Zealand " ; Dunedin, 1864. 

8. " On the Geology of the Province of Otago, New Zealand." James Hector. Geol. Mag., 

233, 1864 ; Quart. Jour. Geol. Soc, London, vol. xxi, p. 124 ; Phil. Mag., vol. xxix, 
p. 157. 

9. " Expedition to the West Coast of Otago, New Zealand ; with an .\ccount of a Low Pass 

from Martin's Bay to Wakatipu." James Hector. Jour. Royal Geogr. Soc, London, 
vol. xliv, p. 96 ; Proc. Royal Geogr. Soc, London, viii 47, ix 32. 

10. " Origin of Rock-basins in New Zealand." James Hector. Geol. Mag., vol. ii, p. 377. 

11. " The Glacial Epoch in New Zealand." James Hector. Geol. Mag., vol. vii, p. 95. 

12. " Glacial Deposits in New Zealand." Julius von Haast. Nat. Hist. Rev., July, 1864. 

• Quart. Jour. Geol. Soc., London ; vol. xi, p. 521. 



6 

13. " Notes ou the Causes which liave led to the Excavation of Deep Lake-basins in Hard 

Kecks in New Zealand." Julius von Haast. Quart. Jour. Geol. Soc, London, 
vol. xxi, p. 130 ; Phil. Mag., vol. xxix, p. 159. 

14. " Notes on the Climate of the Pleistocene Epoch of New Zealand." Julius von Haast. 

Phil. Mag., vol. xxix, p. 398. 

15. " Notes on the Rev. J. E. Tenisou-Wood's Paper ' On the Glacial Epoch in Australia.' " 

Julius von Haast. Trans. Royal 8oc., Vict., vol. viii, p. 273. 

16. " On the Deposition of the Alluvial Deposits in the Otago Goldiields." L. 0. Beal. 

Trans. N.Z. Inst., 1870, vol. iii, p. 270. 

17. " On the Date of the Last Great Glacier Period in New Zealand, and the Formation ol 

Lake Wakatipu." F. W. Hutton. 1872. Trans. N.Z. Inst., vol. v, p. 384. 

18. " On the Formation of Lake Wakatipu." F. W. Hutton. Trans. N.Z. Inst., 1872, vol. v, 

p. 394. 

19. " On the Cause of the Former Great Extension of the Glaciers of New Zealand." F. W. 

Hutton. Trans. N.Z. Inst., 1875, vol. viii, p. 383. 

20. " On the Geology of New Zealand ; with Special Reference to the Drift of that Country." 

(Abstract.) James Hector. Nature, 258, Jan. 27, 1876. 

21. " Geology of Otago. ' F. W. Hutton and G. H. F. Ulrich. Dunedin. 1875. 

22. " On the Glacial Action and Terrace-formations of South New Zealand." J. T. Thomson. 

1873. Trans. N.Z. Inst., vol. vi, p. 309. 

23. " On the Date of the Glacial Period : a Comparison of the Views represented in the 

Transactions N.Z. Inst., v and vi." A. D. Dobson. Trans. N.Z. Inst., 1874, vol. vii, 
p. 440. 

24. " The Glacial Period of New Zealand." Thomas Mackay. Trans. N.Z. Inst., 1874, vol. vii, 

p. 447. 

25. " Notes on the Ancient Glaciers of New Zealand " ; reprinted from Ann. Lyceum Nat. 

Hist., N.Y., 1876. J. C. Russell. Nature, xvi, p. 100. 

26. " Notes on Dr. Haast's Supposed Pleistocene Glaciation of New Zealand." W. T. L. 

Travers. Trans. N.Z. Inst., vol. vii, p. 409. 

27. " Remarks on the Cause of the Warmer Climate which existed in High Northern Latitudes 

during Former Geological Periods." W. T. L. Travers. Trans. N.Z. Inst., 1877, 
vol. X, p. 459. 

28. " Further Remarks." W. T. L. Travers. Loc. cit., p. 470. 

29. " On the Formation of Lake Wakatipu." William Stuart. Trans. N.Z. Inst., 1881, 

vol. xiv, p. 407. 

30. " Geology of Canterbury and Westland." Julius von Haast. Christchurch, 1879. 

31. " On the Origin of the Old Lake-basins of Otago." (Abstract.) A. McKay. Trans. 

N.Z. Inst., 1883, vol. xvi, p. 550 ; and N.Z. Geol. Sur. Reports of Explorations, 
1883-84, p. 76. 

32. " Otago Lake-basins." A. McKay. N.Z. Geol. Sur. Reports of Explorations, 1883-84, 

p. 76. 

33. " On the District between Dart and Big Bay." James Park. N.Z. Geol. Sur. Reports 

of Explorations, 1886-87, p. 121. 

34. " On the Goldfields of Otago." T. A. Rickard. Trans. Am. Inst. Min. Eng., vol. xxi, 

p. 441. 

35. " Sketch of the Geology of New Zealand." F. W. Hutton. Quart. Jour. Geol. Soc, 

vol. xli, p. 191. 

36. " General Geology of New Zealand." F. W. Hutton. Nature, xxxi, p. 305. 

37. " Sketch of the Geology of New Zealand." (Abstract of paper to Geological Society of 

London.) F. W. Hutton. N.Z. Jour. Sc, vol. ii, pp. 435, 486. 



38. " Oil the Foliated Rocks of Otago." F. W. Huttoii. Trans. N.Z. Inst., 1891, vol. xxiv, 

p. 359. 

39. " Glacial Action in New Zealand." F. \V. Hutton. Trans. Aus. Ass. Ad. Sc, 1891. 

40. " Report on the Older Auriferous Drifts of Central Otago." Alex. McKay. Wellington, 

1897. 

41. " Kingston Moraine." P. Marshall. Trans. N.Z. Inst., vol. xxxv, 1902, p. 387. 

42. " A Bathymetrical Survey of the Lakes of New Zealand." Keith Lucas. Geographical 

Journal, May and June, 1904. 

43. " On Some Glaciated Stones from Queenstown, Lake Wakatipu." EveljTi 6. Hogg, M.A. 

Trans. N.Z. Inst., vol. xxxvii, 1904, p. 426. 

44. " Geological Notes on the Country North-west of Lake Wakatipu." P. Marshall. Trans. 

N.Z. Inst, 19C5, vol. xxxviii, p. 560. 

45. " The Geology of the Area covered by the Alexandra Sheet, Central Otago Division." 

James Park. Bulletin No. 2 (New Series), N.Z. Geol. Survey. Wellington, 1906. 

46. " The Geology of the Cromwell Subdivision, Western Otago Division." James Park. 

Bulletin No. 5 (New Series), N.Z. Geol. Survey. Wellington, 1908. 

47. '■ Neujahrsblatt von der Naturforschenden Gesellschaft auf das Jahr, Neuseeland." 

Albert Heim. Ziirich, 1905. 

Acknowledgments. 

The author wishes to acknowledge his appreciation of the services of his student-assistants, 
whose zeal and energy aided very materially in the conduct and completion of the work under- 
taken during the year. The mountainous character of the country, the steepness of the slopes, 
and the profound nature of the watercourses rendered the field-work extremely tiring and 
arduous, at all times necessitating the expenditure of a large amount of physical energy. 
Special acknowledgment is due to Mr. Edward F. Roberts, A.O.S.M., for the care he exercised 
in the carrying-out of topographical and bathymetrical surveys, and in the compiling and 
plotting of the maps, plans, and sections ; to Mr. Harold Hamilton, for petrographical, bathy- 
metrical, and geological work ; and to Mr. C. A. Cotton, M.Sc, and Mr. Frank L. Park, for 
topographical and geological details. 

Much interest was manifested in the conduct of the work by miners and other residents 
of the districts examined. Useful information and material assistance were given by so many 
that it would be difficult to name all to whom thanks are due. The author wishes therefore 
to place on record his warm appreciation of the courtesies offered to himself and party during 
the progress of the work at the various places that formed centres of operation — notably, 
Macetown, Arrowtown, Skipper's, Queenstown, Moke Creek, Twenty-five-mile Creek, and 
Walter Peak Station. 

Special acknowledgment is due to Dr. Maclaurin, Dominion Analyst, for the analyses 
quoted in the text ; to Captain R. A. Edwin, R.N., for data relating to the rainfall at 
Queenstown ; to Mr. L. O. Beal, mining engineer, for information relating to the Macetown 
lodes ; to Mr. Richmond Keele, for data in regard to the rise and fall of Lake Wakatipu ; and 
to Mr. William Wilcox, for botanical notes on Wakatipu region. 



8 



CHAPTER II. 



PHYSIOGRAPHY 





Page 




Page 


Mountains, — 




Lakes — continued. 




Wakefield Range 


. 8 


Lake Kilpatrick 


.. 18 


MacandrewJMountains 


9 


Lake Johnson 


.. 18 


Richardson Mountains 


. 10 


Lake Dispute 


.. 19 


Eyre Mountains 


. 10 


Lake Luna 


. . 19 


Origin of Mountain-chains 


. 10 


Great Faults, — 




Rivers and Valleys, — 




Arrow Fault 


.. 20 


Kawarau River 


. 12 


Soho Fault 


.. 20 


Shotover River 


. 12 


Shotover Fault 


.. 20 


Arrow River 


. 13 


Moonlight Fault 


.. 21 


Lakes, — 




Queenstown Fault . . 


.. 21 


Lake Wakatipu 


. 14 


Kawarau Fault 


.. 21 


Origin of Lake Wakatijju Basia 


. 15 


Flora 


.. 21 


Glacial Lake Wakatipu 


. 16 


Climate 


.. 22 


Lake Hayes 


. 17 


Table of Heights 


.. 23 


Moke Lake 


. 18 







Mountains. 

This district is occupied by four high mountain-ranges having a general north-and-south trend. 
They are the Wakefield, Macandrew, Richardson, and Eyre mountains, the three first-named 
being drained by rivers that flow into the Kawarau River. 

The Wakefield Range forms the divide between the Motutapu and Arrow ; the Macandrew 
Mountains, the divide between the Arrow and Shotover. The Richardson Momitains lie 
between the Shotover and Lake Wakatipu, but their crest-line is so close to the latter that 
the bulk of the drainage passes to the Shotover side, the streams draining the Wakatipu slopes 
being for the most part small, short, and steep. The Eyre Mountains lie on the west side 
of Lake Wakatipu, and form the barrier between that lake and the Te Anau watershed. Thus 
we have four mountain-chains, and three dividing-valleys, as under, beginning at the north 
boimdary : — 

L Wakefield Range. 

(a.) Arrow Valley. 

2. Macandrew Mountains. 

(b.) Shotover Valley. 

3. Richardson Mountains. 

(c.) Wakatipu VaUey 

4. Eyre Mountains. 

The trend and general disposition of these ranges with respect to each other and 
Lake Wakatipu will be most easily understood by a reference to the sketch shown in 

Fig. 1- 

The Wakefield Range. — This trends north and south, and is the continuation of the main 
range, of which the Crown Range lying between the Lower Arrow and Cardrona is merely 
the southern end. It is about twenty miles long, and at its northern end joins the Macandrew 
Mountains near Mount Motutapu. Its altitude varies from 5,000 ft. to 6,000 ft. above the 
sea, the culminating point being Mount Soho, an ice-shorn dome-shaped peak which attains 
a height of 5,743 ft. 

About foiir miles north of Soho there is a depression in the range some 4,000 ft. high, 
forming a pass ov'er which a bridle-path crosses from the Arrow to the Motutapu Valley. The 



9 

slopes of the range are everywhere covered mth tussock and native grasses, among which the 
beautiful white gentian [Gentiana corymhifera) grows in great profusion, generally at heights 
between 2.500 ft. and 4,000 ft. Above Macetown the western grass-covered slope, from 
2,000 ft. to the summit of the range, is deeply impressed with terraced benches and other 
marks of ice-erosion. 




Fi( 



1. SUdWISli DlSI'OSlTIoN (IK .\1(HNTAIN-(11AI>S. 



The Wakefield Range is so named in honour of that distinguished pioneer and soldier 
statesman, Captain Edward Gibbon Wakefield, of Nelson. 

The Macandrew Mountains. — These con.sist of a chain of great mountains lying between 
the Arrow and Shotover. The well-known Coronet Range, which is crossed by the main road 
to Skipper's Point, is but the southern termination of the Macandrew Mountains, which extend 
far beyond the limits of this district, forming the divide between the Upper Shotover and 
Matukituki River. They join the main a.xial divide at Mount Tyndall, opposite Mount Aspiring, 
their total length being somewhere near thirty-five miles. 

The prominent peaks, beginning at the south end, are the Coronet, 5,400 ft. ; Vanguard 
Peak, 5,799 ft. ; Mount Marsden, 4,363 ft. ; Advance Peak, 5,700 ft. ; Mount St. Just, 5,631 ft. ; 
and Mount Hyde, 5,790 ft., situated near the source of the Arrow River. Lying to the north 
of Mount Hyde is Mount Motutapu, 6,720 ft., north of which the Macandrew chain rapidly 
dwindles in width, gathering itself into a single narrow serrated razor-back range that is sur- 
mounted by a series of high peaks, among which may be named End Peak, 6,926 ft. ; Treble 
Cone, 6,888 ft. ; Black Peak, 7,560 ft. ; Niger Peak, 6,616 ft. ; and Fog Peak, 6,700 ft. 

The eastern slopes of the Macandrew Mountains within our present boundaries are deeply 
dissected and commonly precipitous — that is, on the outcrop or escarpment side of the strata. 



10 

On the reverse or Shotover side the slopes are also excessively steep, being generally uniform 
with the angle of dip ; but they are smooth and even, and in many places show the terraced 
and mammillated effects of ice-erosion in a wonderful state of preservation. 

The immunity which the western slopes of the mountain-chains traversing this region 
have till now enjoyed from pluvial dissection is due to the circumstance that the summit-line 
is so close to the trunk rivers in the case of the Wakefield and Macandrew Mountains, and 
to Lake Wakatipu in the case of the Richardson Mountains, that the gathering-ground is 
too small and restricted in area to permit the formation of large streams The streams that 
now exist, or, rather, the stream-channels, are mostly narrow gutters, fairly straight, with 
a V-shaped cross-section, and a bottom that commonly has the same pitch or inclination as 
the mountain-slope. 

The Macandrew Mountains have been named after the late Mr. James Macandrew, one 
of Otago's most distinguished statesmen and pioneers. 

The Richardson Mountains. — These include Ben Lomond and Bowen Peak, overlooking 
Queenstown, and the confused chain of ice-shorn mountains stretching northward between the 
Shotover and Lake Wakatipu. They also form the divide between the Shotover and the 
Rees rivers, and, sweeping northward from Mount Aurum, join the main axial divide at 
Mount Edward, 8,459 ft. The highest peaks, begimiing at the south end, are Ben Lomond, 
5 747 ft.; Bowen Peak, 5,322 ft. ; Mount Gilbert, 5,775 ft. ; Mount Crichton, 6,185 ft. ; Ben 
More, 5,987 ft. ; Mount Larkins, 7,432 ft. ; Mount Hamlet, 7,200 ft. ; Stone Peak, 7,222 ft. ; 
Mount Aurum, 7,315 ft. ; Centaur Peak, 8,284 ft. ; Mount Cunningham, 7,681 ft. 

The Lake Wakatipu or western slopes of these mountains are in many places deeply 
grooved, terraced, and ice-shorn by the ice-sheet that flowed down the Wakatipu Valley. 
A lateral stream of the great glacier flowed into the head of Moonlight Creek by what is now 
known as the Twenty-five-mile Creek, and two streams crept into Moke Valley, one by the 
Lake Dispute Valley and one by the Five-mile Creek, both streams uniting at Moke Lake 
which is more accessible from Lake Wakatipu than from Moonlight Creek, the trunk stream 
into which it drains. 

The Eyre Mountains. — The portion of these mountains lying within the Queenstown 
Subdi\-ision comprises Cecil Peak, 6,477 ft. ; Walter Peak, 5,956 ft. ; and Mount Nicholas, 
4,827 ft. The slopes of Cecil Peak, lying opposite Queenstown, from the level of the lake to a 
height of nearly 6,000 ft. are finely grooved and rounded by ice-erosion. Mount Nicholas is 
a conspicuous dome-shaped elevation lying between the Von River and the Afton Burn. It 
lav right in the track of the great Von Glacier, and its smooth, rounded summit and equally 
smooth slopes are the result of long-continued ice-erosion. The Eyre Mountains run first 
north-and-south, then trend west, and opposite the upper reach of the lake, under the name 
of the Humboldt Mountains, once more run north-and-south. 

Origin of Mountain-chains. 

An examination of the country lying between the Arrow and Lake Wakatipu shows at 
once that the origin of the great parallel mountain-chains described above is the result of close 
folding of the rock-formations. From the Arrow to the Eyre Mountains the strata have a 
simple continuous dip towards the west, the general trend of the ranges being more or less 
parallel with the axis of the overturned folds and shear-planes. 

On the other hand, the existence of powerful faults traversing the main valleys has been 
well established, and there seems to be no serious difficulty in belie\dng that these mountain- 
chains as we now see them owe their origin to great dislocations along the axes of the over- 
folds and shear- planes, in which flu\'iatile and glacial action, acting singly or in concert, 
have excavated the present narrow rift-like dividing valleys 



11 

Thus we find that the comparatively flat-lying schists were puslied hy tangential stress 
into great folds running nearly north-and-south. In the troughs of the folds there were 
entangled strips of Pliocene and Miocene strata. The stress from the west exceeded that from 
the east, thus overturning the folds. When the folds were closed the progressive tangential 
stress was relieved by the shearing or sliding of one fold over the other, the shear-planes being 
more or less parallel to the axis of the major folds. Along the shear-planes the rocks were more 
shattered and dislocated than elsewhere. They were lines of weakness, and along their course 
fluviatile action became most active, and in time established the present trunk valleys. In 
other words, tlie mountain-chains of the main divide are tectonic ; and the dividing valleys 
areas of fluviatile erosion, following for the most part the axes of overfolds, the troughs of 
which are traversed by thrust-planes of great magnitude. 

In the following diagrammatic section arc shown the four mountain-chains, the Arrow and 
Shotover faults, the great Wakatipu fault that runs along the upper reach, and the westerly 
dip of the strata : — 



y^' /'' //' / ,' > ' ,' /' ^ 



/ ' 



/ / 




Fig. 2. Shkwino .Mount.vin-cilvin.s axd Faults in tmk Arrow, Shotover, and Wakatipu Vaixevs. 

(a.) Humboldt .Mountains. (6.) Richardson Mountaiivs. (c.) Macandrew .Mountain-s. (rf.) Wake- 
field Riviijje. (e.) I..ake Wakatipu. {/.) Shotover Valley and fault. (</.) Arrow Valley 
and fault. (A.) Wed^je of involved 'I'ertiarie.s. 

1. Jlica-schi.st. 2. Chlorite-sclust. 3 and 4. Mica-schi.st. .5. Slaty mica-schist. ti. .■\ltored 

greywacke. 



The Arrow fault is plainly discornil)le inasmuch as it causes a repetition of the great 
chlorite-schist bands that are so prominent a feature of the geological structure below and 
above the junction of the Arrow and Soho streams. 

The Shotover fault runs aloug the floor of the alluvial gold-mining claims .situated on 
the high terrace on the west side of the valley between Skipper's Point and Maori Point. It 
is a feature well known to the local miners, being commonly named the " Pug lode." It crosses 
the Shotover a short distance below the mouth of Long Gully, and thence passes southward 
in an almost straight line across the shoulder of Coronet Range to Arthur's Point. Going 
northward it crosses the Skipper's Creek near the mouth of Butcher's Gully, and thence proceeds 
northward to the junction of the Right Hand Branch of the Shotover. 

The Arrow and Shotover fault-planes formed initial lines of weakness, and it may be 
reasonably contended that they were marked by depressions that would in time become 
deepened and widened by the trunk river following the zone of dislocation. It is obvious that 
the main valleys were formed, and the great drainage-systems of the present day established, 
some time before the advent of the Pleistocene glacial period. The advancing ice-sheet, with its 
tongue-like prolongations, in course of time, by continuous grinding and digging, still further 
deepened and widened the trunk valleys, leaving their slopes grooved, rounded, mammillated, 
and terraced as we now see them. 



12 

Rivers and Valleys. 

Kawarau River. — The Kawarau drains Lake Wakatipu, and, even at the outlet, at what is 
known as the " Kawarau Falls," is a river of majestic and imposing size. The streams draining 
the slopes of the Eyre and Richardson mountains flow into Lake Wakatipu, and, since the 
Shotover and Arrow flow directly into the Kawarau, it is seen that the Kawarau carries 
the whole of the drainage of the region dealt with in this report. 

The author, by a number of approximate measurements made near Cromwell during the 
summer of 1906-7, computed the average summer flow of the Kawarau* at 10,500 cubic feet 
per second. More exact gaugings made in March of the present year, at a time when the river 
was at about mean summer-level, gave a flow of 13,417 cubic feet per second. The details of 
these last measurements and gaugings will be found in the chapter on " Hydrology." 

Shotover River. — This is the largest tributary the Kawarau receives anywhere in its course, 
from its source to its confluence with the Clutha at Cromwell. It drains the western slopes 
of the Macandrew and the eastern slopes of the Richardson mountains, and is mainly snow- 
fed. Its flow is subject to great variation, more especially in spring and early summer, being 
influenced in these seasons by warm ^vinds and rains acting on the already melting snows 
of winter. When gauged on the 9th March the flow of the Shotover above Skipper's Point 
amounted to 360 cubic feet per second. In times of high flood this flow is increased twenty 
or perhaps even thirty fold. 

The Shotover joins the Kawarau at right angles to the course of the latter, and, when 
in flood, by reason of its great volume and velocity of entry, obstructs the flow of the Kawarau, 
which, being imable to spread itself, owing to the great height of its banks, is thus partially 
dammed back, its waters on occasion rising so high as to flood and obliterate the rapids at the 
outlet of the lake. On such occasion there may be seen the rare spectacle of water running 
into, instead of out of, Lake Wakatipu. 

The Shotover runs close under the foot of the Macandrew Mountains, and consequently 
receives no feeders of any moment from that side. On the west side it is joined by Moonlight, 
Stony, Skipper's, Right Hand, and other large streams, which, with their numerous branches, 
have dissected the eastern side of the Richardson Mountains into a maze of picturesque tent- 
shaped ridges, whose gable-like ends rise one above the other in ascending tiers until the summit 
of the main divide is reached. 

The Right Hand Branch, Skipper's, and Stony creeks, although so widely separated at their 
confluence with the Shotover, all rise on the slopes of Mount Aurum, and enclose vrithin their 
watershed an area that for the height of its ridges and steepness of contour is perhaps without 
a parallel in New Zealand. The ridges are tent-shaped, and separated by V-shaped gorges 
that are seldom more than a few yards wide at the bottom. 

The existence of these wonderful tent-shaped ridges that present their gable ends to the 
Shotover is to be explained by the circumstance that the country rock is a soft crumbling 
mica-schist with a continuous dip to the westward, cut transversely by the lateral streams that 
drain into the Shotover. And there is indubitable evidence that this profoimd erosion and 
dissection have taken place since the glacial period — that is, in the geological yesterday. 
On the ends of the steep gables facing the Shotover there are still to be seen the 
remains of the horizontal or gently flowing ice-cut rock-benches that marked thc- 
western slopes of the Shotover glacial valley. These ice-shorn remains are well seen 
when standing on the main road between the mouth of Stony Creek and Maori Point and 
looking westward. 

The Shotover River, from some miles above the junction of Skipper's Creek to a point 
a mile below Arthur's Point, runs in a narrow rock-cut channel or gorge that is excavated 200 ft. 

* James Park. BuUetin No. 5 (New Series), N.Z. GeoL Sur., 1908, p. 22. 



PLATK ill. 




c.a.C.r, 



(Iah:.i;i) I{iui:i:s kuudki) sinck <ii.A(i.\i. Pkiuod. 







l.ooKixi; II' I hi; Amow (Iokim-; 



I'lll/ftiii \o. 7.] 



To face J). 12. 




< 

g 

a 
o 



Pi.ATH V 



Ul.l) ll.\M.I.\u-\ AI.I.KV ul Al;l;()\\ lii\l-,j; 





I'ho'o Jollies Park.'] 



v-fP" 




IcE-.<Huli.\ Toi! AXi) C'l!Ai: O.N" SKIITKIiS KoAU. 



I'hoto Mills A^jiiiia//.] 



Mate Yi. 




0:n Cokonkt Uaxue, I^oad to .Skippeh's Point. 



I'lioto h'lit hij Toui\.-it Ufpt.] 



PLATE VII. 





.SUUIUVKU ('ultGli, OX KOAU TO SkIPPEk's I'oiNT. 
i'hoto lent bi/ Tuuriit iJept.] 




o 



D 

rJl 



PLATE IX. 




Bui-i.EXDALE Creek, Skipper's, 

Photo Jomfs Pari-.] 



-HO 



wixr; Profound Erosion of Features since Glacial Period. 



Bulletin No. 7.] 



[To facp p 13. 



13 

below the floor of the old glacial valley. The sides of this gorge are so steep that the river can 
only be reached with safety in a few places along the whole of its course. 

The floor of the old glacial channel, lying, as we have seen, about 200 ft. above the present 
river-level, is also excavated in the solid rock, in many places being sharply defined with vertical 
waUs and an even pavement-like floor. 

After the retreat of the glacier the outlet of the valley became temporarily blocked, thus 
causing the Shotover and its tributaries to cover the floor of the glacial valley with gravels 
to a depth of 200 ft. The river-terraces between Skipper's Point and Maori Point are the 
remains of this old flood-level. 



Old, Chanrvelf 




Fia. 3. Section across Shotover Valley, showing High-level Terrace-gravels lying on Floor of 

OLD Glacial Channel. 

(o.) -Mica-schist. (6.) Terrace-graveLs. (c.) Shotover Fault, locally known as the " Pug Lode." 



The largest tributary of the Shotover is Moonlight Creek, with a summer flow of about 
52 cubic feet per second. It cuts back almost to the west side of the Richardson Mountains, 
taking its rise in Lake Luna, which is separated from the Twenty-five-mile Creek, draining 
into Lake Wakatipu, by a distance of only a few hundred yards. The main branch of Moon- 
light Creek is Moke Creek, carrying a summer flow of some 24 cubic feet of water per second. 
It rises in Moke Lake, which is easily accessible from Lake Wakatipu by two glacial valleys 
— namely, the one in which Lake Kilpatrick lies, and the other occupied'^by Lake Dispute, 
which is drained by the Nine-mile Creek. 

Next to Moonlight in size comes Stony Creek, carrying a summer mean flow of 28 cubic 
feet per second, and after it Skipper's Creek, of historic fame for the richness of both its gold- 
bearing drifts and gold-bearing veins. Skipper's is a considerable stream, carrying a summer 
flow of about 15 sluice-heads, or 15 cubic feet, per second. 

Arrow River. — The course of this river from its junction with the Kawarau to Arrowtown, 
a distance of four miles, is nearly due north, passing along the foot of the Crown Terrace. 
At Arrowtown it turns sharply to the north-east, its course pursuing this direction until the 
jimction of the Soho or Roaring Billy is reached. In this distance, which is some four miles, 
the river runs through a steep narrow gorge. At the mouth of the Soho the Arrow Valley trends 
north-west until Macetown is reached — a further distance of five miles. Above Macetown 
the trend is north-north-east. From Arrowi;own to the Soho the Arrow follows the course 
of a powerful fault which also passes up the valley of the Soho itself, a continuation of the 
middle reach of the Arrow. 

At MacetowTi the Arrow is joined by the Goldburn, a stream on which is situated the 
well-known Premier, Tipperary, and other mines. Below the junction of the Goldburn' at 
Macetown, the flow of the Arrow on the 15th November, 1907, amounted to 80 cubic feet 



14 

per second, and above the junction to 65 cubic feet. This would give a flow of 15 cubic feet 
for the Goldburn. The Arrow and the Goldburn are mainly snow-fed, and their mean summer 
flow is much less than the flow in spring. 

From the Kawarau junction to Macetown, the bed of the Arrow River rises a height of 
700 ft. in some fourteen miles. By lifting the river at a point half a mile below the Soho 
junction, a valuable supply of water could be obtained for motive power and irrigation, the 
available head being sufficient to command the greater part of Arrow Flat. The scheme 
is one of no great cost, and presents no engineering difficulties whatever. The distance of the 
pipe-line from the inlet to Arrowto\\'n would not exceed three miles and a half. 

The present gorge of the Arrow is merely a narrow notch cut in the floor of the old glacial 
valley which formerly stood at the level of the Crown Terrace, and was therefore at the close 
of the glacial period a hanging- valley lying some 750 ft. above the Arrow Flat, which it over- 
looked. Even now there is no difficulty in tracing the outline of the old valley. The western 
slopes of the Crown Range behind Mount Beetham are still distinctly marked with ice-cut 
terraces and benches up to a height of 5,500 ft. ; and on the west side, notwithstanding the 
deep sculpturing of the slopes effected by the streams descending from the Coronet Range, there 
are still to be seen remnants of undulating or horizontal glacial benches up to 3,000 ft. above 
the floor of the present Arrow Valley. 



Lakes. 

Lake Wakatipu. 

The Mid- Wakatipu Survey District includes that portion of Lake Wakatipu lying between 
Queenstown and the Twenty-five-mile Creek on the north, and between Cecil Peak and Momit 
Nicholas on the south side. The lake consists of three main reaches, the upper and lower 
of which lie in an almost north-and-south line. The middle reach runs nearly east and west. 

The extreme length of the lake, measured along the centre-line, is a little tinder fifty 
miles. The width varies from 1-5 to 3-3 miles, the mean breadth being 2-3 miles. The shore- 
line is remarkably regular, being broken only by Frankton Arm and Bob's Cove. The bays 
are merely shallow indentations, while none of the promontories extend far beyond the general 
coast-hne. 

The lake has an area of 112 square miles, exclusive of the group of small islands lying near 
hhe north end. 

The surface of the water has a yearly range in level, according to Mr. R. Keele, of 
4 ft. 8 in. between the maximum summer and minimum winter levels. The mean 
height of the surface of the water is 1,015 ft. above sea-level, checked by the railway levels 
at Kingston. 

In reply to the author's inquiries, Mr. Richmond Keele, the Postmaster at Queenstown, 
writing under the date of- the 8th May, 1908, courteously supplies the following information 
with respect to the yearly rise and fall of the lake : The lake, he says, " as a rule rises once 
in the year to the 6 ft. level on the gauge-board attached to the jetty ; sometimes twace. On one 
occasion I have seen it reach the 6 ft. 6 in. mark, and on the other hand I have seen it fall 
to the 11 in. mark above what is called the normal mark, which is, I believe, a line laid down 
many years ago when the lake happened to be very low. During the past twelve months 
the lake rose to the 6 ft. 3 in. level and fell to the 1 ft. 2^ in. level, a difference of 5 ft. ^ in. 
between the highest and lowest readings. For the twelve months previous the highest level 
reached was 6 ft. 1 in., and lowest 2 ft. 1 in., giving a difference of 4 ft. During the year 
prior to the last quoted the highest level was 5 ft. 11 in., and the lowest 1 ft., a difference 
of -4 ft. 11 in. The average yearly range is probably about 4 ft. 8 in," 



>< 




16 

The lake is bordered by the Remarkables and Richardson mountains on the north side, and 
by the Eyre and Humboldt mountains on the south side. These mountains lie so close to the 
lake that their slopes are extremely steep, in many cases rising from 5,000 ft. to 6,000 ft. above 
the lake in a horizontal distance of two or three miles. 

The catchment-area of the lake is about 1,200 square miles in extent. It is bounded on 
all sides by ranges that attain a height varying from 5,000 ft. to 9,000 ft., and cany a large 
amount of snow during the greater part of the year. The northern end of the Humboldt and 
Richardson mountains and Mount Earnslaw and Forbes Mountain maintain extensive snow- 
fields throughout the whole year ; hence the Dart and Rees rivers, draining these, supply 
the bulk of the water flowing into the lake. The only other considerable streams flowing 
into the lake are the Greenstone, Von, and Lochy rivers, draining the Humboldt and Eyre 
mountains. The Remarkables (6,000 ft. to 7,600 ft.), lying between Kingston and Queenstown, 
rise so abruptly from the shores of the lake that they contribute praotically nothing to the 
catchment-area, being too steep to afford a footing for other than a thin veneer of winter 
snow, which disappears with the first appearance of spring. 

The Eyre Mountains (5,000 ft. to 6,500 ft.), fringing the opposite side of the lake, in that 
portion of them lying between Kingston and Mount Nicholas, lie so close to the water's edge 
that their contribution to the drainage is very small, none of the streams carrying more than 
a few cubic feet of water per second, with the exception of the Lochy, the mean summer 
flow of which does not exceed 25 cubic feet per second. 

The crest-line of the Richardson Mountains (5,000 ft. to 7,500 ft.), from Queenstown 
to Glenorchy, also lies so near the lake that the slopes are drained by a number of small 
brooklets that dry up in summer or carry only a few sluice-heads of water. The only 
exceptions to this, in a distance of thirty-five miles, are the Twelve-mile Creek, 
with a minimum summer flow of 10 cubic feet per second, draining a permanent snow- 
field on the south face of Mount Crichton ; the Twenty-five-mile Creek, with a flow of 
7 5 cubic feet, draining the slopes of Ben More ; and Bucklerburn, with 20 cubic feet, 
descending from Mount Aurum. 

The Origin of Lake Wakatipu Basin. 

Lake Wakatipu lies in a rock-bound basin. The surface of the water is 1,015 ft. above the 
sea, and its maximum depth is 1,242 ft.,* giving the point of greatest depth at 227 ft, below 
sea-level. 

The height of the rock-rira at the south end of the lake near Athol is about 850 ft. above 
the sea, or 165 ft. below the present level of the lake. From this it will be seen that Lake 
Wakatipu as it now exists is partly rock-bound and partly barrier-bound, the barrier being the 
great moraine at Kingston. The present outlet at Kawarau P'alls is over a ragged rim of 
rock about l,00()ft. above sea-level. 

The first recorded attempt to explain the origin of Lake Wakatipu was made by Sir James 
Hector, who, in one of a series of lectures " On Mining in New Zealand " delivered at the 
Colonial Museum, Wellington, in the year 1869, ascribed the formation of the lake to differential 
subsidence.! In the following year Mr. James McKerrow,J who possessed an intimate know- 
ledge of the lake and its bordering mountains, having for some years prior to this been 
engaged in the topographical and geodetic survey of this region, ascribed the origin of the 
lake to glacial erosion, supporting his contention with all the cogency of many carefully 
observed facts. 



* Keith Lucas. " The Geographical Journal," June, 1904, p. 7.53. 
t James Hector. Trans. N.Z. Inst., vol. ii, p. 374. 

j James McKerrow. " On the Physical Geography of the Lake District of Otago." Traas. N.Z. In-st., 
vol. iii, p. 254. 



16 

Captain Hutton,* in 1872, in a paper " On the Formation of Lake Wakatipu," states 
his complete agreement with Mr. McKerrow, and at the same time shows the many difficulties 
that lie in the way of acceptance of Hector's theory of unequal subsidence. Again in 187.5 
he still maintains his adhesion to the theory of ice-erosion,f in doing so following the lead of 
the distinguished Sir Andrew Ramsay, who, by his brilliant work in glaciology, was the first 
to show that almost the whole of Britain had been covered with a continuous ice-sheet. Ramsav 
was also the first to perceive the competency of a valley-glacier to excavate its floor so as 
to form a true rock-basin. From the early fifties till his death he consistently maintained 
this view, which in later years has received emphatic support from such eminent geologists 
as Sir Archibald Geikie, Professor James Geikie, Professor Heim, and Professor Penck. 
Tyndall. the physicist, whose investigations of the Alpine glaciers of Europe form a monu- 
ment of patient and painstaking research, also held %news of glacier-erosion similar to 
those of Ramsay. 

Mr. Alexander McKay,! in a paper " On the Origin of the Old Lake-basins of Otago," 
read before the Wellington Philosophical Society in 1883, reviews the difierential subsidence 
and ice-excavation theories of rock-basin origin, and gives his adhesion to the former. Pro- 
fessor Cox, in the discussion which followed, disagreed with Mr. McKay, beUeving that the 
old lake-basins had been to a large extent excavated by ice. 

The author, after an investigation of the numerous e\'idences of intense glaciation pre- 
sented in this district, is of the opinion that the origin of Wakatipu rock-basin is partly due 
to subsidence caused by faulting and partly to ice-erosion. A discussion of the competency 
of glacier-ice to excavate basins will be found in the chapter devoted to " Glaciation." 

Glacial Lalce Wakatipu. 

The tiers of old lake-beaches, seven or more of which can be distinctly traced in different 
places around the present shore-line, rise to a height of 150 ft. above the present lake-level, 
and afford con\ancing proof that the surface of the lake at one time stood much higher than it 
now does. The old beaches are nearly always composed of small biscuit-shaped pieces of 
mica-schist of fairly imiform size. They are in all cases unconformable to the glacial drifts 
and morainic matter on which they rest, as, for example, at Queenstown, at the Five-mile 
Creek, and other places. 

The old beaches contain little morainic or foreign ice-borne material, nor are they overlain 
by glacial drift, from which it may be inferred that it was after the recession of the glacier 
that the lake stood at the higher level. 

It is a noticeable feature of the old beaches that the highest one is often bounded by an 
even line of steep scarp or cliff, such as may be seen on any shore-line of the present day. Even 
when the top beach is so fringed it is commonly composed of the usual yellowish-brown biscuit- 
shaped shingle, but not everywhere. In places between the Five-mile Creek and Queenstown, 
and from Frankton southward along the lake-face of the peninsula, the 150 ft. beach is found 
to be excavated in the solid schist. Perhaps it would be more correct to say that the rocks 
have been eaten into rather than excavated by the action of the water, which appears to have 
remained at this level for a considerable time. It is just probable, although there is no proof 
of it, that the eating-away of this old strand was in part the work of floating masses of ice. 
Alternating frost and thaw, by shattering and crumbling the rock, would also afford the water 
effective help in the work of erosion. 

* Captain Hutton. Trans. N.Z. Inst., vol. v, p. 394. 
t Hutton and Ulrich. " Geology of Otago," Dunedin, 1875, p. 87. 

t A. ilcKay. Trans. N.Z. Inst., vol. xvi, p. .550 ; and N.Z. G.S. Reports of Explorations, 1883-84, 
p. 76. 



17 

When the waters stood at the 150 ft. contour Lake Wakatipu covered a much larger 
area than it now does. The Domain at Queenstown, Frankton Flat, and a large part of 
the peninsula were submerged, while all the low-lving land in the lower Shotover and Arrow 
were within the limits of the glacial lake, as also was Lake Hayes and all the low ground in its 
vicinity. The lake extended from the Kawarau Falls along the foot of the Remarkables, thus 
isolating the Crag-and-Tail Hill, which then stood out of the water as a steep ice-worn island. 
In other places there was little change in the size or torm of the lake on account of the steepness 
of the land, except at the upper end, where the waters extended far up the Dart and Rees 
valleys, and ramified along the floor of all the lateral streams. 

The form of the present and glacial lakes is shown in the next two figures. 




Fios. 4 AND 5. Showing the Present Form of Lake Wakatipu and of the Glacial Lake 

RESPECTIVELY, ON A SCALE OF TwELVE .MiLES TO AN InCH 



Lake Hayes. 

This is a picturesque sheet of water situated on the main coach-road to Arrowtown. The 
upper end is about two miles from Arrowtown, and the lower about eight miles from Queens- 
town. Its length is somewhat under two miles, and its breadth varies from 30 to 50 chains. 
It covers an area of 655 acres, and its surface lies 1,080 ft. above the sea. The greatest 
depth is 108 ft., found at a point about 75 chains from the upper end and 15 chains from the 
west side. 

The floor is almost flat for nearly a mile in length, and lies below a depth of 100 ft. The 
trend of the line joining the inlet and outlet is north-and-south (magnetic). 

The lake presents an almost imbroken shore-line, deep bays or sharp promontories being 
entirely absent. It lies in a rock-basin, the rim of which is only some 14 ft. below the surface 
of the water. On the east and west sides the lake is bounded by gently undulating, ice-planed, 
terraced hills composed of mica-schist, and at the upper end by a low alluvial flat, not many feet 
above the level of the water. The flat is in its turn bounded by a terrace composed mainly 
of finely bedded silts and rock-flour. 
2 — Queenstown. 



18 

The south end of the lake is fiinged by a marshy flat reaching to the edge of the coach-road, 
and behind this flat — that is, between the lake and the Kawarau River — there is a high alluvial 
terrace composed of excessively fine silts or rock-flour intercalated with beds of a soft grey 
calcareous ooze that has been found to be of great value as a fertiHser. A detailed description 
of this calcareous deposit, locally called " limestone," will be found in the chapter devoted 
to " Economic Geology." 

The terraces fringing the lake on the west side are partly rock-cut and partly fragmental. 
These terraces are old high-level beaches that mark the successive levels of the lake after the 
retreat of the ice-sheet. The topmost beach corresponds with the highest of the old beaches 
contouring round the shore of Lake Wakatipu, and indicates the flood-level at the time Lake 
Hayes formed part of glacial Lake Wakatipu. 

Mohe Lake. 

This lake lies at the source of Moke Creek, at a height of 1,710 ft. above the sea. It is 
distant some nine miles from Queenstown, and is most easily accessible by way of the Five- 
mile Creek, flowing into Lake Wakatipu. This stream runs back to a low saddle in an ice- 
excavated valley, from which is a gentle descent to Moke Lake. The lake can also be reached 
by way of Arthur's Point and Moonlight Gorge, a journey of twelve miles ; or by the Nine- 
mile Creek and Lake Dispute, and thence up the ice-shorn valley to the low saddle above, 
whence there is a gentle descent to Moke Lake. 

This lake lies in a basin surrounded with beautifully ice-planed ridges and mountains. 
It is shaped like a horse-shoe, its unusual form being due to the circumstance that it lies in 
two rock-basins that join at their lower end. Twin lakes like Moke Lake are not unknown 
in the glaciated regions of Northern Europe and North America. 

The lake at one time extended down to the upper end of the Moke Gorge, but the Right 
Hand Branch of Moke Creek and the mountain-torrents descending from Ben Lomond have 
filled up the lower end with detritus. The fan of a stream descending from Ben Lomond 
has also filled in a considerable area of the eastern arm — nearly 30 acres in extent — thereby 
destroying the continuity of the shore-line of the old glacial lake. 

The area of the lake is 240 acres. The length of the east arm is 63 chains, of the west 
arm 70 chains, while the greatest width of the united arms is 46 chains. 

The two arms of the lake are separated by a narrow tussock-covered ridge that has been 
worn down to a low sharp point, called Wedge Point, at the meeting-place of the two glaciers 
that excavated the basins (see Plate IX). The greatest depth of the lake is 145 ft., found 
a short distance off Wedge Point. 

The planting of carefully selected sorts of trees on the flats and fans would greatly enhance 
the beauty and attractiveness of this place as a tourist resort. 

Lake Kilpatrick. 
This is a small tarn situated in the glacial valley in which lies the eastern arm of Moke 
Lake. It is 18 chains long, and varies from 3 to 8 chains in width. Its area is lO'S acres. 
Soundings disclosed the fact that it is quite shallow, the depth nowhere exceeding 12-5 ft. 
The bottom is covered with submerged logs of timber, mostly those of beech. This lake lies 
about 80 ft. above Moke Lake, or at a height of 1,790 ft. above the sea. 

Lake Johnson. 
This occupies a small rock-basin at the north end of Queenstown Hill. It is about a 
mile and a half from the head of Frankton Arm and half a mile from the Shotover. It lies at a 
height of 1,285 ft. above the sea. Its length is 45 chains, and mean width 14 chains. The 
eirea is 70 acres. The greatest depth was found to be 88 ft. 




I'hoto Jai„i.< I'lirl:.] 



MuKi: I.AKK ((ii.Aci.vi. Tui.\ Lakk). 




I'h<,li. J, I, IKS l'<irl:.\ 
Hull I tin Xo. 7.] 



I-AKK DlSl'LTE, I.OOKI.\(; lOWAKUS l-AKT WaKATI I'U . 



[To fare f. IS. 



PLATE XII. 




Ice- TERRACED Slopes of Bex More, looking across Lake Luxa. 
Photo Jamns Park.} 



r»..77 -i •„ ^7_ fy 1 



19 

The rock-rim at the lower or outlet end is 55 ft. below the summer water-level of the 
lake, as shown in the following diagram : — 




Fio. (). Showing Longitudinal Section of Lakk Johnson, with Rock-kim and Gravel Barrier. 
A. Lake JohiLson. B. Shotover. C. Shotover Flat. a. Pleistocene Gravels. b. Mica-sthi.st. 



Lake Dispute. 
This is another rock-basin lying in a narrow ice-excavated valley at the head of Nine- 
mile Creek. It is a little over a mile long, and varies from 4 chains wide at the lower end 
to nearly 15 chains wide near the upper end. Its area is between 60 and 70 acres. No sound- 
ings were taken of this lake, as it was found impracticable to get a boat on to it. However, 
it is improbable that the depth anywhere exceeds that of Moke Lake, and the probability 
is that it is nmch shallower. Its catchment-area is very small, being under four square miles. 
The summer flow of its outlet is about 2-15 cubic feet per second. (See Plate XI.) 

Lake Luna. 

This lake is situated at the head of Moonlight Creek, at the e.xtreme north end of Mid- 
Wakatipu Survey District, and all but the south end of it lies in Glenorchy Survey District. 
Its surface is 2,620 ft. above sea-level. It occupies a rock-basin in the floor of a narrow glaci- 
ated valley that extends back to the Twenty-five-niile Creek, from which it is separated by a 
low saddle. 

The greatest length of the lake is about a mile and a quarter. The width varies from 
a few chains at the south end to about 20 chains near the lower end. The flow of water from 
the outlet amounted to 4-25 cubic feet per seccjnd on the 24th March of this year. 

Lake Luna can be most easily reached from the Twenty-five-mile Creek, that flows into 
Lake Wakatipu about three miles below the .south end of Pig Island, either by crossing a 
pass 4,400 ft. high in the Richardson Mountains, at a point some four miles past the 
Twenty-five-mile Creek, or by following up the course of the Twenty-five-mile itself. The 
journey by either route takes about four hours. 

The lake lies at the foot of Ben More, 5,987 ft., the western slope of which has been deeply 
grooved, from the level of the lake to the summit of the range with the most remarkable and 
best-preserved series of glacier-benches to be found in the Wakatipu district or elsewhere in 
New Zealand. These ice-cut terraces are shown very well in Plate No. XII. They 
vary from 30 ft. to nearly 70 ft. in height, and from a few yards to over 2 chains in width. 
They are excavated in a fairly hard quartzose mica-.schist. The broader benches often have 
an undrained depression at the back, generally close under the slope ascending to the next 
platform. Altogether some thirty rock-benches can be counted on the mountain-slope above 
the lake, and it is not a little singular that a like number can be traced, although not .so clearly, 
on the western grass-covered slopes of the Remarkables, between Kingston and Staircase 
Gully, and on the eastern slope of Cecil Peak, facing Queenstown, 
2*— Queenstown, 



20 

As shown by the distribution of the foreign transported material, the flow of ice was from 
Lake Wakatipu, up the valley of the Twenty-five-mile, and thence down the valley of Moon- 
light Oeek. The glacier-benches, as may be gathered from a perusal of Plate XII, slope 
gently upward at the lower end of Lake Luna, this upward slope being doubtless that taken 
by the ice-plough after excavating the rock-basin near-by. 

Rock-benches corresponding to those on the north-east side of Lake Luna can also be 
traced on the opposite side of the lake — that is, on the eastern slopes of the Richardson Moun- 
tains — but they are not so well preserved as those just described, having been cut through 
in many places by small lateral streams and gullies. 

What is shown on the Mid- Wakatipu District 8heet of the Lauds and Survey Depart- 
ment as a large lagoon was found to be a small rock-tarn, some 6 chains by 4 chains in 
size, draining into the Twenty-five-mile. It has been excavated in the floor of the old 
glacial valley, the present deep V-shaped gutter in which the Twenty-five-mile nms being a 
feature of comparatively recent date. 

Great Faults. 

There are six powerful faults in the area examined that have either a structural import- 
ance or have exercised an influence in determining certain prominent physical features. They 
are the Arrow, Soho, Shotover, MoonUght, Queenstown, and Kawarau faults, all of which 
are indicated on the map facing this page. 

Arrow Fault. — This crosses the Crown Range and traverses the course of the Upper Arrow 
from the junction of the Soho to Macetown, whence it follows the valley of the Goldburn to 
the saddle on the Macandrew Range lying immediately west of Advance Peak, whence it 
passes into the Upper Shotover Valley, which it reaches about a mile above the mouth, of 
Rapid Creek. 

The general course of this fault is north-west and south-east. Its distinctive feature is the 
manner in which it causes a repetition of the great chlorite-schist band of the lower Arrow. 

Soho Fault. — This fault crosses the Crown Range and passes down the Soho to the Arrow, 
which it follows to a point lying between Arrowtown and Mount Beetham, whence it crosses the 
Arrow Flat, pursuing a south-west course which carries it along the east side of Lake Hayes, 
where its path is well marked. -It crosses the Kawarau River a short distance below the mouth 
of the Shotover, and thence traverses the valley that lies between Peninsula Hill and the 
Remarkables, eventually reaching the shore of Lake Wakatipu at Drift Bay, which lies a little 
south of Jack's Point. 

This great fault hades towards the north-west at angles varying from 35° to 50°. It follows 
a line of depression throughout its course, the Soho and Arrow valleys. Lake Hayes, and the 
lower arm of Lake Wakatipu lying in its track. To what extent these basins are due to faulting 
is, of course, a matter of mere conjecture, but that the Soho fault formed a line of dislocation 
which offered favourable conditions for the operation of fluviatile and glacier erosion is a 
conclusion that seems to be warranted by the existing circumstances. The lower arm of 
Lake Wakatipu is doubtless to some extent a rift-valley, as may be judged from the dislocation 
of the schists on the two sides of the lake, caused partly by this fault and partly by the Shotover 
fault. 

Shotover Fault. — This is locally known as the " Pug lode." It was first identified in the 
terrace claims near Skipper's Point. Its course is about 5° east of true north, and it inclines 
to the west at angles that are rarely under 70°. 

From Skipper's Point, going northward, it crosses into Skipper's Creek, which it crosses 
near the mouth of Butcher's Gully, whence it traverses the ridge lying south of Old Man Creek, 
and then passes into the Upper Shotover near the junction of the Right Hand Branch, 



To accornpcavy IBxjILetxrh 2T° 7 . 




MAP 



- Showin g direction of flow of - 
Queenstown Pleistocene Glaciers 



— ALSO — 

— Ma j or Faults 

— of Queenstown Area 

Glacier Flow ^^'f Faults ^ 

„ ^ , ^ Scale jfEii^i|hMile6^ ,„ 





1 THE REEFS 

(SKIPPERS) 



SKIPPERS i 



MtCjIbert jftJIAOH\ 

"7* /k POINT 



V 



^ACETOWN 



Lake . yy\ Bowleyfl' 
K I i^n Lomond \^"h 



]^ie Cro)rn\ 
'5t,73 



/Lake 
I HAfEi 



1^ 



Double Cone 



Mf-Looku, 



sefz' 1/ /^\^ I fough 

E y/j r e Mount a i ^^ti 

•^ ■^ Ridge Pk ■*' 




'TT 






— Faults — 

li° I _,.Arroyv Fault 

„ 2 - Soho 

, 3 Shotover t 

„ 4... Moonlight 

, 5.. Queenstown 

, 6 Kawarau 

By Authority - John Macfiay. Ooutrnmtnt Printar. 




rZ50JO/8.3 74 



21 

Going southward from Skipper's Point, the Shotover fault follows the west side of the 
vaUey of that river until it reaches a point near Long Gully, where it crosses the Shotover, 
and, traversing the flank of the range, descends to Arthur's Point, whence it pursues a southerly 
course to Lake Wakatipu, the south arm of which lies along its track. 

Moonlight Fault. — This is the great thrust-plane miming parallel with the axis of the 
overturned fold, along which the wedge of Tertiary strata is deeply involved. It can be traced 
from Bob's Cove to the Upper Shotover. Its course is a little to the east of north, or almost 
exactly parallel to the Shotover fault. It has been fully described in connection with the 
involvement of the Tertiary conglomerates and sandstone, and calls for no comment here 
except to say that its significance as a structural feature of great importance was first noted 
by Mr. A. McKay. 

Queenstown /'aw/<.— This fault runs from the back of Queenstown along the steep ridge 
that leads up to Ben Lomond Saddle. Its course is clearly marked along the surface by a deep 
line of depression that can be traced quite clearly up the steep slope of the mountain when 
standing on the terrace behind Firth's. It is locally spoken of as a lode, but on examination 
it was found to be a simple fault-line, along which no mineralisation had taken place. 

Kawarau FauH. — This fault crosses the Crown Range at the Cardrona Saddle, descending 
to the Kawarau Valley, which it follows to a point nearly opposite the Kawarau Falls, whence 
it crosses the crest of Peninsula Hill, locally known as the " Crag-and-Tail," and then descends 
to Lake Wakatipu. 

From the crest of the Crag-and-Tail its course is marked by a ditch-like line of depression, 
the prolongation of which extends to Beach Bay, where the rocks are much faulted and 
broken. 

The depression along the course of this fault is easily followed as it passes upward from 
tiic level of the lake to the crest of Peninsula Hill (Crag-and-Tail), being visible by the unaided 
eye even when many miles away. It is perhaps more easily distinguished from a distance 
than near-by, and is nowhere better seen than from the deck of a steamer standing out of Beach 
Bay on her way to Queenstown. 

The ditch-like depressions that follow the courses of the Queenstown and Kawarau faults 
must be taken to indicate a comparatively recent date for the movements that formed them. 

Queenstown and the region round about it are not infrequently the scene of earthquakes 
that are local rather than regional. The origin of these seismic disturbances has always been 
inexplicable, but may, after all, be traced to periodic slippings along these two faults, on which 
we have evidence of recent movement. 



Flora. 

The Wakefield and Macandrew mountains, and the Remarkables, lie on the edge of the 
great dry belt of Central Otago, and are destitute of trees or forest vegetation of any kind. 
The fringes of beech-forest on the shores of Lake Wakatipu, found creeping up the steep 
slopes of the Richardson and Eyre mountains, for the most part following watercourses and 
depressions, are all that now remain of the great forest that at one time covered the whole 
of the lower Wakatipu region. But, although forests are the exception rather than the rule, 
it must not be supposed that vegetation is scarce. From the level of the lake to the 2,000 ft. con- 
tour there is a well-defined zone, in which the hardy bracken (Pteris aquilina) grows so 
profusely and luxuriantly as practically to exclude all other forms of vegetation in its own 
domain, with the exception, perhaps, of the tutu (Coriaria rusdfolia), which seems to be 
able to resist all the efEorts of the fern to choke and displace it. 

Above the fern there is a zone covered with a great variety of subalpine shrubs, and above 
this there comes the typical tussock-land, reaching up to 6,500 ft. above the sea. 



22 

The bracken in its present abundance is a comparatively late arrival in the district, 
its present place having been formerly occupied by native shrubs and grasses. The rapid 
spread of the fern is the direct result of the persistent burning of the tussock, which, being 
iniable to survive the successive fires that swept through it year by year, died out completely, 
its place being taken by the more vigorous bracken. The fern, however, is not without its 
uses, chief of which is the binding-power of its deep-reaching matted roots, whereby the soil 
on the mountain-slopes is prevented from being washed into the lake. It will doubtless 
continue in possession mitil the land is required for tree-planting or some other form of 
cultivation. 

Most conspicuous in the zone above the fern is the graceful native heath {Dracophyllum 
uniflorum), and among the smaller plaiits the beautiful snowberry (Gatdtheria antipoda) and 
the prickly little epacris (E. pauciflora), both of which grow in great profusion on the slopes 
of Perseverance Peak, around which the mountain-track to Ben Lomond gently winds. 

The forest-trees are almost exclusively beech, among which Fagus Solandri, F. diffortioides, 
F. funca, and F. Menziesii are well represented. Fagus Blairii is occasionally seen near the 
lake-level, as also are two unusual forms that seem to lie between F. Solandri and F. Blairii. 
On the shore of the lake between Queenstowii and Bob's Cove there are a few examples of 
what appear to be an aberrant form of F. jusca. 

Among other trees are the totara (Podccarpus Mara), kowhai {Sophora tetraptera), and 
titoki (Alectryon excelsmn). The beautiful makomako, or wineberry {Aristotdia racemosa), the 
koromiko ( Veronica salicifolia), the konini {Fuchsia excorticata), and tutu (Coriaria ruscifolia) 
are everywhere abundant in damp situations along the shores of Lake Wakatipu. The manuka, 
or tea-tree, {Leptospermum scoparium) grows plentifully on the dry gravel terraces between 
Queenstown and Bob's Cove, but is seldom seen far from the lake. The thorny Wild Irishman 
(Diacaria toumatou), the " tumatukuru " of the South Island Maori, is fairly abundant every- 
where at places between 1,000 ft. and 2,000 ft. Coprosmas and veronicas, in great variety, 
are present everywhere. 

Among herbaceous plants are the white gentian (Gentiana corymhifera), very plentiful 
from 2,000 ft. to .3,500 ft., and numerous Senecio, Cdmisia, and Raoulia. Of the latter, 
R. Parkii, first found at Mount Alta, in the Wanaka country, by Mr. Alexander McKay in 1880, 
is now very abundant at a'l heights between 1,000 ft. and 3,000 ft. In the past few years 
this patch-plant has spread down the Kawarau and Clutha valleys into the low country as 
far as Alexandra. In many places it has taken complete possession of extensive areas of 
river flat and terrace, a consequence resulting from the destruction of the native grasses by 
fire, aided perhaps by the spoliation caused by the rabbit. 

I am indebted to Mr. William Wilcox, gardener in charge of the Queenstown Domain, 
for the following list of Olearia and Senecio growing in the Domain : Olearia angustifolia 
(Hooker),* 0. avicenni;efolia (Hooker), 0. Colensoi (Hooker), 0. Forsteri (Hooker),* 0. fur- 
furacea (Hooker), 0. Haasti (Hooker), 0. insignis (Hooker),* 0. macrodonta (Baker), 0. 
moschata (Hooker), O. nitida (Hooker), 0. nummularifolia (Hooker),* 0. oleifolia (Kirk), 
0. Traillii (Kirk),* 0. Traversii (Hooker),* O. virgata (Hooker) ; Senecio Bidwilhi (Hooker), 
S. Buchanan! (Armstrong),* S. Grezii (Hooker),* S. Huntii (F. Muell.),* S. Hectori (Buchanan),* 
S. elseagnifolius (Hooker),* S. laxifolius (Buchanan),* S. Monroi (Hooker), S. revolutus (Kirk). 

Climate. 

Reference has already been made in the opening paragraphs of the first chapter to the 
scenic attractions and salubrious climate of Queenstown and surrounding region. It would be 
difficult to find words of sufficient praise for the climate, which is unsurpassed by that of any 

* Introduced from otlier parts of New Zealand. 



23 

other part of New Zealand — a country justly famous for its equable temperature, floods of sun- 
shine, refreshing showers, and verdure of vegetation all through the year. 

The climate of the district around the shores of Golden Bay, in Nelson, perhaps compares 
more nearly than that of any other part of the Dominion with the climate of Lake Wakatipu. 
It is sunny and dry both in summer and winter, but lacks the bracing and invigorating whifE of 
the clear mountain air for which Queenstown is celebrated. 

In the Wakatipu district there is no clay subsoil^ — a matter of no little importance in deter- 
mining the healthfulness of a place utilised for settlement. The rocky tumbled moraines, gravel 
terraces, and old lake-strands at all times insure the most perfect underground drainage for 
the rainfall. 

According to Mr. Richmond Keele, the average number of days of sunshine per year, 
calculated from the returns of the past three years, amounted to 268 days upon which the 
sun shone wholly or partly either at 9 a.m. or 2 p.m., when the daily record was taken. 

I am indebted to Captain R. A. Edwin, R.N., Director of the Government Meteorological 
Office, Wellington, for the following particulars relating to the recorded rainfall at Queens- 
town : — 

The rainfall-record for that place, which extends from 1871 to 1880, and from 1890 to the 
present time, shows that the mean annual rainfall is .'51 17 in., and that the driest month of 
the year is August, and the wettest Uctolier. The winter, summer, and autumn are dry, 
the greatest rainfall coming in spring, when it is most needed. 

The lowest recorded rainfall for twelve months was 22-42 in. in 1879 ; and the greatest, 
6008 in. in 1878. It will be noted that the wettest year on record was followed by the 
driest. 



Table of Heights. 

During the progress of the work, barometric heights were obtained of 
junctions of streams, lakes, and many points of geological and topograph 
the readings were taken twice, and most of them checked by a reference to 
point. 



Arrowtown, at junction of Bush Creek 

Soho and Arrow junction 

Coronet Creek and Arrow junction 

Macetown junction 

Scanlon's Creek junction 

Bush Creek junction.. 

P\>rks of Bush Creek . . 

Sawyer's Creek junction 

Skipper's Point 

Platform of Skipper's Bridge 

Shotover, below Skipper's Bridge 

Bullendale . . 

Junction of Skipper's branches 

Roaring Meg junction 

.Junction of Stony Creek 

Pleasant Terrace 

Yates Terrace, Stony Creek . . 

Left Hand Branch, Shotover . . 

Arthur's Point Pass to Shotover 

Mouth of Moke Creek 



passes or saddles, 
ica,l interest. All 
a trigonometrical 

Ft. 
1,175 
1,525 
1,660 
2,000 
2,060 
2,400 
2,750 
2,930 
1,800 
1,605 
1,400 
2,175 
1,950 
1,980 
!,;»5 
1,800 
1,850 
2,2.30 
1,.350 
1,420 



24 



Ben Lomond Saddle. . 

Top of Resolution Peak 

Lake Kilpatrick 

Moke Lake . . 

Moke Creek Post-office 

Junction of Maconnachie's and Moke creeks 

Low level on copper lode from Moke Creek 

Lake Dispute Saddle 

Lake Dispute 

Moke Lake Saddle from Five- mile Creek 

Lake Johnson 

Mouth of Shotover . . 

Shotover Terrace, on main road 

Signal Hill . . 

Von Terrace 

Saddle on Richardson Range, on track to Lake Luna 

Saddle between Twenty-five-mile Creek and Lake Luna 

Lake Luna 



Ft. 
4,150 
3,750 
1,790 
1,710 
1,830 
1,500 
1,560 
1,830 
1,525 
1.990 
1.285 
1,000 
1,185 
1,480 
1,165 
4,400 
2,690 
2,625 



25 



CHAPTER III. 



GI-ACIATION. 



Extent and Cliaracter of Glaciation 
Rock Hummocks, or Roches Moulon- 

nies 
Glacial Till . . 

Origin of Glacial Till 
Erratics 

Macetown Erratic . . 

Skipper's Point Erratic 
Perched Blocks 
Moraines 

Queeastown Eskar 
Wakatipu Glacier 
Ice-terraced Mountain-slopes 

Lake Luna lee-benches 

Mamniillated Slojies of Coronet Range. . 



Page 

25 

26 
26 
27 
28 
28 
29 
29 
30 
30 
31 
31 
31 
32 



Ice-terraced Mountain-slopes — continued 
Glaciated Remarkables 
Ice- benching on Concave Slopes 

Ice-cut Platforms 

Striated Surfaces, and Direction of Striae 

Slope and Crag 

Thickness of Ice-sheet . . 

Motion of Glaciei-s 

Excavating-power of Glaciers . . 

Northern Limits of Ice-sheet 

Age of New Zealand Glacial Period 

Cause of Glacial Period 

Henley Boulder-day . . 

Outcrop Curvature 

Exfoliation of Striated Skin of Erratics 



Page 

32 
32 
32 
33 
34 
35 
36 
38 
40 
41 
41 
43 
43 
43 



Extent and Character of Glaciation. 

The features of the land in the Lake Wakatipu region, and from there southwards to the plains 
of Southland and eastward to the sea, up to a height of 6,500 ft. above sea-level, are every- 
where dominated by evidences of ice-erosion on a scale of magnificence that is unknown 
elsewhere in the [Southern Hemisphere, and is perhaps without a parallel outside the polar 
regions. 

The existing valley-glaciers of New Zealand rank among the largest on the globe ; but 
they are as shrivelled pigmies compared with the majestic sheet of moving ice that in the 
glacial period covered all but the^^highest peaks, and drove its furrowing coulters deeply into 
the sides of the resisting mountains. 

Each va'ley and depression contained its own glacier, but all were united in one, forming 
part of the great continental ice-sheet that covered the land. During the period of greatest 
refrigeration the ice-sheet attained a maximum thickness probably exceeding 7,400 ft. Its 
surface formed a vast plateau, through which only the tops of the highest peaks appeared, 
looking like lonely islets in a frozen sea. 

A strikitig feature of this gigantic glaciation is the remarkable freshness of the ice-grooved 
surfaces, the beautiful flowing contours being everywhere sharply outlined in their carpet of 
native grasses. 

Hitherto it has been the practice of New Zealand geologists to speak of a great extension 
of the present day valley-glaciers, but to deny the existence of a glacial period similar to that 
of the Northern Hemisphere. This view was attended with many difficulties. It ignored the 
fine ice-shorn rock-benches on the slopes of Ben More Range in Central South Canterbury, 
and the existence of the .sheet of glacial silts and boulder-clay covering a wide stretch around 
Timaru and Dunedin. It attempted to find some explanation for the existence of the Henley 
Boulder-clay that did not involve a glacial period, and failed to recognise the remarkable 
evidences of glaciation presented on all hands in the Wakatipu region. 

Hutton was always opposed to a Pleistocene glacial period in New Zealand. He thought 
it doubtful whether kames, drumiins, true erratics, or stratified till deposits existed in the 
country ; and contended that the Ice Age in New Zealand consisted only of a great extension 
of the valley-glaciers of the South Island. There was no evidence, he said, of the former 



26 

existence of an ice-sheet, or of any floe ice or icebergs in the New Zealand seas, and no proof 
that any of the glaciers, even in the period of their greatest extension, reached the sea.* 

Sir Julius Von Haast,t as the result of an intimate knowledge of the alpine regions of 
Canterbury and Westland, believed that by far the greater portion of our Southern Alps was 
covered with perpetual snow during what he called " The New Zealand Glacier Period." He 
also contended, in opposition to Hutton, that the West Coast glaciers extended some distance 
into the sea. 

In the Wakatipu region, along the floor of the valleys, there are to be found eskars, rock- 
basins forming lakes and tarns, roches moutonnees, ice-grooved and striated hummocks, true 
erratics, perched blocks, morainic matter, and till ; on the foothills, broad ice-cut platforms 
or benches ; and on the slopes of the mountain-ranges, tier upon tier of ice-cut benches and 
innumerable mammillated hummocks. 

In the direction of flow of the Kawarau branch of the Wakatipu glacier, erratics from a 
few pounds in weight up to hundreds of tons occur in countless numbers, scattered over the 
valleys and foothills from the level of the lake up to a height of 4,000 ft. above the sea, or 
3,000 ft. above the lake. In certain localities scores of these foreign ice-borne stones are 
grooved and striated. Large angular masses of the fossiliferous Tertiary sandstone are found 
on the flanks of Perseverance Peak and Bowen Peak, at heights ranging from 1,950 ft. to 
3,000 ft., having been torn from their place at Bob's Cove, some 1,000 ft. or 1,300 ft. above the 
sea, and carried onward and upward by the advancing ice. 

Rock Hummocks, or Roches Moutonnees. 

These occupy a great part of what is known as the Arrow Flat, which is merely a glacier- 
basin or cirque, bounded on three sides by the Kawarau, Shotover, and Arrow rivers, and on 
the remaining side — that is, on the west — by the Coronet Range — itself merely the southern 
termination of the Richardson Mountains. (See Plate XIV.) The even, ice-shorn, grass- 
covered slopes of the Coronet Range, as seen from Arrowtown, sweep around the west side of 
the Arrow Cirque in a great crescent, like the auditorium of a gigantic amphitheatre. 

The roches moutonnees occur in narrow, more or less continuous, ridges that trend from 
Arrowtown to the Kawarau — that is, they follow in a general way the strike of the mica-schist, 
which is about north-west-south east. They are commonly rounded in outline and whale- 
backed in longitudinal elevation. In some places they are so worn down as to be almost 
obliterated, in other places they attain a height of 30 ft. or 40 ft. In the area lying between 
Lake Hayes and Arrowtown the space between the successive rock hummocks and ice-planed 
ridges is filled with fluvio-glacial drift, which is sometimes so deep as to all but cover the 
underlying hummocks. 

East of Hogan's Road, near the junction of that road and the Arrowtown-Cromwell Road, 
the hummocks are often separated by undrained hollows that become tarns in the winter and 
spring. 

The general trend of these ice-worn ridges lies at right angles to the flow of the glacier-ice, 
as determined by the direction of the striae on the rock-surfaces fomid at Arrowtown and 
elsewhere. 

Glacial Till. 

The floor of the Arrow Flat and the gently undulating slopes of all the ice-shorn ridges 
lying in the bottom of the Arrow Cirque, between the Shotover and Arrow rivers and between 
the foot of the Crown Range and Kawarau, are covered with a sheet of greyish-coloured stony 

* Captain F. W. Hutton. " Glacial Action in New Zealand," pamphlet, Aust. Assoc. Adv. Science, p. (i ; 
and " Geology of Otago," Dunedin, 1875, p. 80. 

t Haast. " Geology of Canterbury and Westland," Cliristchurch, 1879, p. 379. 



PLATE XIII. 




WiiAi.K-BACK Mica-. sen I ST Hidge.s and (iI.aciai, KsKAiiS NKAH AiiHOWTOWN, WITH Lah(;i: Khhatic 
IX FoitKfiiiOuxn Axu Ckowx Tkhkace ix Distaxck. 

I'lioto Join IS I'(irh.'\ 



liulhtin No. 7.] 



y'l'o facv '[). 2G. 



> 

X 




o 

g 
o 



o 



PLATE XV 




AkkoW KsKAIt IN M 11)1)1. K DlST.WCK, 



I'hoto Jaiiif'it I'(irh.~\ 




Photo James Park.'] 



Stony Boui.der-ci.ay, Akhou town. 



27 

glacial till, consisting of a confused deposit of excessively fine glacier sand and clay mingled 
wnth a sprinkling of rounded gravel and angular and semi-angular fragments of quartz and 
niica-schist. The finer material consists mainly of quartz and quartzose mica-schist ; the 
coarser mainly of greywacke, and the red and green breccia-tuffs commonly associated 
with that rock. The quartzose material is of local origin, while the greywacke and its asso- 
ciates are foreign to the district, being ice-borne from the mountains lying between Lake Te 
Anau and Lake Wakatipu. In a few places the till is rudely stratified. It is extremely 
fertile, and for that reason is highly cultivated. 

The till also covers the surface of the Crown Terrace, and is found on the slopes and summit 
of Queenstown Hill, up to a height of 3,000 ft. above the sea, or 2,000 ft. above the surface of 
Lake Wakatipu. A thin sprinkling of greywacke gravel, and occasionally red clay, is also found 
on the slopes of Perseverance Peak, on the track to Ben Lomond, up to a height of 3,000 ft. 
above the lake. 

In general terms it may be said that this till is found everywhere, over hill and dale, in 
the wake of the Kawarau branch of the groat Wakatipu glacier. 

It should be noted that among the foreign material in the till there is always a small per- 
centage of granite, norite, diorite, and other crystalline igneous rocks. In a few places these 
rocks occur more plentifully than in others, and in this respect the lower slopes of Queenstown 
Hill, facing Frankton Arm, and the vicinity of Lake Johnson are specially favoured localities. 

The crystalline rocks occur in small pebbles and in well-rounded boulders up to 2 ft. in 
diameter. 

A few erratic boulders of greywacke and greenstone breccia of large size lie imbedded in 
the till on the Arrow Flat and Crown Terrace. 

Origin of (ilacial Till. 

The till varies considerably in composition in different places. In one place fine-bedded 
silts predominate ; in another, clays, silts, sands, grits, and angular fragments of quartz and 
schist of all shapes and sizes are intermingled in a confused mass or perhaps rudely stratified, 
while in other places the material is mainly fluvio-glacial drift, in which well-rounded foreign 
rocks are conspicuous. Along the margin of the Arrow Cinjue the till consists mostly of 
small angular pieces of schist, always quite fresh and undecomposed, and closely resembling 
the small screenings of broken rock often used in the making of concrete- work. But one 
class of material is found to pass into another sort with a suddenness that sometimes causes 
nmch perplexity and astonishment. 

The origin of the till does not appear to be due to the operation of one cause, but rather 
to two or more causes or agencies operating at the same time. In one place we have silts and 
rock-flour that were manifestly laid down in still water, in another the boulder-clay of a 
ground-moraine, and in another gravels and drifts that are purely fluvio-glacial. 

The water-worn drifts were obviously formed by subglacial streams that drained the ice- 
sheet at different points, uniting, and branching, and uniting again. The boulder-clays appear 
to have been infra-glacial material spread out in the wake of the retreating ice-sheet ; while the 
finely bedded silts, with paper-like lamina', consist of rock-meal and rock-flour that settled 
slowly in tarns or lagoons. Gold-bearing slimes that are allowed to settle slowly in the 
settling-tanks used in connection with the cyanide treatment of gold and silver ores always 
exhibit a finely laminated structure ; and in tarns with a gentle overflow the silts would 
doubtless settle in the same manner. .\t certain points the different sorts of glacial material 
meet and intermingle. 

The till found spread over Queenstown Hill and adjacent ridges, up to 3,000 ft.' and more 
above the surface of Lake Wakatipu, is verj- largely fluvio-glacial drift, and must have been 
infra-glacial material, entangled in or near the under-surface of the ice, and carried upward 



•28 

as the advancing sheet surmounted the ridges it encountered in its path. The masses of 
fossiUferous marine sandstone plucked from the Lower Tertiary rocks at Bob's Cove, and 
carried to a height of 3,000 ft. on the slopes of Bowen Peak, prove conclusively that the 
Wakatipu glacier flowed upward and over the obstacles it could not remove. 

The proportion of foreign material in the till varies in different places. In the fluvio- 
glacial drifts on Queenstown Hill probably 60 per cent, of the pebbles and boulders are grey- 
wacke and greenstone breccia derived from the west side of the mountains drained by the 
Greenstone River on the west side of Lake Wakatipu ; while near Arrowtown the material 
is mainly of local origin, only a thin sprinkling of greywacke being present. 

Along the western slope of Queenstown Hill, facing Frankton Arm, as far north as Lake 
Johnson, there is a zone in which, besides greywacke, boulders of granite, norite, and diorite 
are comparatively common — more common than in any other part of the district. These 
crystalUne rocks are not knowTi in situ nearer than the divide between the head of the Eglin- 
ton River and the upper end of Lake Te Anau, which means that they have been carried some 
forty miles from a distant watershed lying on the west side of Lake Wakatipu, and are there- 
fore more travelled than the greywackes which have been transported from the watershed 
of the Greenstone River. 

The greater abundance of crystalline rocks between Frankton Arm and Lake Johnson 
would indicate that this area lay in the track of that portion of the ice-stream which flowed 
from the country at the head of the Eglinton River. 



Erratics. 

These are very numerous along the shores of Lake Wakatipu from the Twenty-five-mile 
Creek to Queenstown, and from there to lower Shotover and Arrow Flat. They form the 
bulk of the material in the fluvio-glacial drifts lying between Bob's Cove and the head of 
Frankton Arm, and of the material composing the Queenstown moraine. 

In the drifts they occur mostly as small boulders, commonly well roimded and generally 
under 2 ft. in diameter, although rounded boulders up to 4 ft. and even 6 ft. in diameter are 
not rare. 

The distribution of the erratics affords a trustworthy guide as to the direction of flow 
of the Wakatipu glacier and of the subsidiary streams of ice that pushed their way to the north 
and east towards Moke Creek and Shotover. 

The great bulk of the erratics is composed of greywacke ; and after that rock, in the order 
of their abundance, come the green and red tuffs and breccias so commonly associated 
with the greywacke. After the greenstone breccias come norites, diorites, and granites. 

The large angular fragments of rock so conspicuous in the Queenstown moraine are 
mainly greywacke and greenstone tuff, ranging from a foot in diameter up to the size of a 
shepherd's hut, the larger masses weighing between 200 and 300 tons. Many of the 
erratics at Bob's Cove and near Lake Johnson are beautifully ice-grooved and striated. 
(See Plate XVII.) 

Of the thousands and tens of thousands of erratics scattered about the Wakatipu 
region, perhaps none are more interesting than one lying in Scanlon's Gully about a mile 
above Macetown, and another in Stevenson's Sluicing Claim at Skipper's Point. 

The Macetoicn Erratic. — The erratic in Scanlon's Gully is a rounded boulder of hyper- 
sthene-gabbro about 2 ft. in diameter. It lies in the bed of the stream a few chains from the 
Goldburn. Scanlon's Gully is a narrow V-shaped valley, some three miles long, bounded by 
grass-covered ridges from 3,000 ft. to 5,500 ft. high. A careful search was made of the floor 
of the valley and of the surrounding slopes and ridges for other erratics, but without result. 



29 

The erratic would appear to be the ouly foreign boulder in the watershed of the Arrow River 
above the jimction of the Soho. At any rate, a careful traverse and examination of the bed of 
the Arrow from Macetown to its source, and of all the small tributaries flowing into it, failed to 
disclose another erratic or foreign boulder of any kind whatever. 

The Arrow watershed is surrounded by mountains rising from 5,000 ft. to 6,000 ft. high. 
By some strange happening this solitary boulder became separated from its associates and 
transported by the ice-sheet northward across the peaks of the Richardson and Macandrew 
mountains, while its fellows were slowly borne eastward towards Queenstown. 

Skipper's Point Erratic. — This was a small rounded boulder of granite, some 8 in. in 
diameter, found by Mr. Miles Aspinall and the author on the floor of Stevenson's Sluicing Claim 
at Skipper's Point. A diligent and protracted search in the bed of Skipper's Creek, and 
among the heaps of boulders piled up in the old sluicing-olaims on the west bank of the Shot- 
over, between Skipper's Point and Stony Creek, failed to di.scover another erratic of any descrip- 
tion whatever. It seems improbable that this boulder can be the only ice-borne erratic in 
so extensive a watershed as that of the Shotover, but others are so rare, if they exist at all, 
that they are not easily found. No outcrop or occurrence of any granitic or other crystalline 
rock is known in the Shotover watershed, while the narrow band of marine Tertiaries deeply 
involved in the Moonlight shear-plane contains only fragments of schist and cjuartz. There is 
no reason to doubt the true erratic character of the boulder. 

Skipper's Point erratic was found among the terrace-gravels lying on the old glacial 
channel of the Shotover immediately below Skipper's Creek junction ; but what stream carried 
it to its place of discovery is impossible to say. The Macetown erratic, as we have seen, was 
found near the mouth of a deep narrow gully, and must have been dropped or stranded not 
far from its present place. That much is certain, but in respect to the Skipper's Point erratic 
we have no such assurance. 

Skipper's Creek reaches back to Mount Aurum, a distance of fifteen miles, and the 
Shotover rises at Lake Lochnagar, at the north end of the Richardson Mountains, distant some 
twenty five miles. It is just posssible — but this is only a surmise — that both the Macetown and 
Skipper's erratics were transported from the crystalline massif near Milford Sound by 
that portion of the continental ice-.sheet which passed over that region. In what way these 
fugitive boulders became separated from their fellows must remain a matter of mere 
conjecture. 

The Shotover watershed is encircled by mountain-chains varying from 6,000 ft. to 8,000 ft. 
high, unbroken anywhere by low pa.sses. It is obvious that the Skipper's and Macetown 
erratics must have been transported by ice that rode over the crest of the Richardson 
Mountaiiis, thus adding one more circumstance to the chain of evidence bearing on the 
former existence of a continental ice-sheet covering the South Island of New Zealand in 
the Pleistocene period. 

Perched Blocks. 

These are ic€-borne erratics that have been stranded in prominent positions. 

A very fine example of a perched l)lock, and the first described in New Zealand, is found 
resting on the crest of a low but somewhat steep ice-worn ridge on the Kawarau .side of Hogan's 
Road, that leads from the upper end of Lake Hayes to the Arrow Bridge on the Cromwell Road. 
It is situated about half a mile from the junction of Hogan's Road and Arrow South Road, 
running behind the Hospital, and can be seen from many points within a radius of a mile. 
(See Plate XVI.) 

This great erratic of greywacke measures some 24 ft. by 12 ft. by 10 ft., and weighs about 
230 tons. It rests directly on the ice-worn surface of the mica-schist. Its lower surface is 
grooved, polished, and covered with fine striiB, that run in tb<» same direction froii\ one end of 



30 

the boulder to the other. The striae are remarkably well preserved. The polished and 
striated surface covers an area of over 400 square feet. (See Plate XVI.) 

About 15 chains west of the perched erratic just described there is another erratic of 
greywacke lying in a hollow. Its dimensions are 20 ft. by 14 ft. by 10 ft., and its weight about 
240 tons. 

Another large erratic of greywacke lies stranded on the floor of the old sluicing-claim on 
the Arrowtown end of the Crown Terrace, near the base of Mount Beetham. It weighs 
about 80 tons, and is situated some 700 ft. higher than Hogan's Road erratics. 

Moraines. . 

There are three well-defined moraines in the area examined during the past summer — 
namely, the Queenstown moraine, Mount Nicholas or Von moraine, and Miller's Flat moraine. 
Of these the Mount Nicholas moraine is by far the greatest. It extends from Beach Bay to the 
Von River, a distance of eight miles, and forms the foothills lying between Walter Peak and 
Lake Wakatipu. It is a lateral moraine, resting on an ice-eroded core of mica-schist and 
schistose greywacke. It consists mainly of tumbled fragments of mica-schist and greywacke, 
some of them of enormous size, mingled with fluvio-glacial drifts that are composed mainly 
of greywacke and quartzose material. Its thickness exceeds 300 ft. 

The Queenstown moraine lies against the foot of Queenstown Hill, facing Lake Wakatipu, 
and, although of small extent, is well known from the circumstance that the greater part of 
Queenstown is built on it, while the beautiful Domain of that picturesque town is situated 
on the tongue of land it forms projecting into the lake between Frankton Arm and Queenstown 
Bay. (See Frontispiece.) It is a lateral moraine, composed chiefly of fiuvio-glacial drifts of 
sand and gravel, with which are mingled numerous angular fragments of rock, ranging from small 
pieces up to masses weighing over 200 tons. The bulk of the boulders in the fluvio-glacial 
drift is greywacke, while the angular masses are mainly composed of the same rock. The 
prevailing greywacke is a fine-grained grey rock, but it is found in endless variety of colour 
and texture — namely, green, red, purple, and speckled ; gritty and brecciated. 

Miller's Flat moraine extends along the foot of the Coronet Range, from the point where 
the coach-road begins to ascend to the Coronet (Skipper's) Saddle to a point half a mile from 
Arrowtown. It is a lateral moraine, mainly composed of mica-schist. At the Arrow end it 
forms low hummocky ridges, but near Millar's Flat it appears as a flat-topped terrace, the 
material having been planed down to an even surface by the Shotover glacier. 

Queenstown Eskar. 

The foothills of Queenstown Hill, lying between Arthur's Point Road and the Frankton 
Arm of Lake Wakatipu, are composed of fluvio-glacial drifts arranged in the form of hummocky 
ridges and eskars that lie immediately above and behind the terrace, at the 150 ft. level, on 
which the convent is built. Starting a little beyond the stone bridge in the street leading 
up from the wharf, the ground rises somewhat abruptly on to the topmost of the ancient lake- 
strands which forms the narrow terrace spoken of above. 

Behind the terrace, and nearly in a Une with the street, there are two short hummocks, 
while a third and larger kame or eskar runs along the back of the terrace for some distance 
towards Frankton Arm. This eskar varies from 60 ft. to 1 00 ft. high, and is mainly com- 
posed of rudely bedded sands and gravels, commonly a yellowish rusty-brown colour. It is 
cut through in a few places by small lateral streams, and is there seen to be overlain by a 
coarse boulder-clay or drift, mainly composed of sand, clay, and greywacke boulders. It is 
probably this covering of coarse drift that has preserved it from destruction. 



PLATIi XV 








~S 



.„. .^^„^ 






,.|^cj^. 




.f^ 



Pu'.iTIOX OK StUIATKD Si-HKACK ok 1'EKCHKU KhHATIC ok (iliKYW AC kk 
Photo C. A. Colloii.} NKAH HofiAX's RoAU, AuKOW Fl.AT. 




PeIUUKU KhKATIC ok trliKYWA(KK, XKAK lIlX.AX :- liUAU, AiUvOW l I.A 1 
I'/iolo JuiiK-' I'nrl:^ 



I lull I- tin Xo. r.l 



\T(i fare -p. 30 



I'l.ATI-: XVII. 




ICE-STIilATKb BOULDEI! OF GheTWACKE, Bob's CoVE, LaKE WaKATIPu. 
I'hoto Janie-' Park.'\ 




Ice-.striated Erratic of Greywacke, ]5ob's Cove, Lake Wakatipu. 
Phiito James Park.l 



PLATE XIX. 



Aei^ow Flat, showing Ice-plaxed Kock-huiimocks 



1 




Plivto James Park.] 




I'lidto ./ami? Park.} 



yUEENSTOWX ESKAK, TAKEN BEHIND CoNVENT 



PLATE XX. 




StOXV CuKKK WaTKIIFAI.!., Al {,'llO^;SIN(; Ol I.WOI.X KD TKiniAKIKri 

I'l,<,t,. Mih.s Aspinal/.] 



31 

This eskar Jies nearly at right angles to the path of the glacier-flow, and the comparatively 
uniform size and bedded character of the material render it difficult to understand the con- 
ditions in which it was deposited. Its shape and material would, however, lend colour to the 
belief that it was laid down in an ice-tunnel drained by a stream running parallel with the 
flank of Queenstown Hill. 

Whatever the true explanation of its formation, it is interesting to note that in outline 
and structure the Queenstown eskar is not dissimilar to those found in Scotland. Its resem- 
blance to the kames around Highlaw, a mile or two south of Cruden Bay, near Slain's 
Castle, on the coast of Aberdeenshire, is very noticeable. 

The Wakatipu Glacier. 

Wakatipu Valley was the meeting-place of giants. The Dart and Rees glaciers, carrying 
a load of schistose material, united at the south end of Mount Alfred and crept down the valley 
till joined by the great Greenstone and Von glaciers that descended from the Livingstone 
Mountains and the region lying to the north of Lake Te Anau. 

The Von glacier, with one leg in the Afton Burn and the other leg in the Von, strode over 
the summit of Mount Nicholas, which it planed down into the beautiful dome we now see 
surmounting that mountain. 

The pressure of the Von glacier, when added to that e.xerted by the Greenstone glacier, 
forced the stream of ice coming from the head of the lake against the Richardson Mountains. 
The course followed by the Greenstone and Von glaciers can easily be traced by the distribution 
of the distinctive load of greywacke material which they carried. After merging into the 
Upper Wakatipu stream the united glaciers descended to Queenstown, where the ice-stream 
divided, one branch continuing down the valley to Kingston, while the other and perhaps 
greater branch flowed down the Kawarau Valley. The pressure from the south-west exerled 
by the Greenstone and Von glaciers caused small lateral streams of ice to flow northward 
through the low passes in the Richardson Range into the Shotover watershed. 

The distribution of the greywacke erratics informs us that a small glacier flowed from 
the main glacier up the Twenty-flve-mile ("reek nearly to Lake Luna, causing a diversion of 
the Ben More glacier into the head of Moonlight Valley. 

Two lateral streams of ice ploughed their way through narrow pa.sses into the Moke Creek 
drainage-area, uniting at the end of Moke Lake, which they excavated in their northward 
course. 

At Queenstown another lateral stream of ice flowed through the gap between Bowen Peak 
and Ben Lomond, uniting with Shotover glacier at Arthur's Point. 

It is obvious that at this time the Wakatipu, Shotover, Arrow, Kawarau, and other 
glaciers did not exist as separate valley-glaciers, but were merely the serrated underportion of 
the great ice-plateau of which they formed the shearing and excavating tools. 

Ice-terraced Mountain-slopes. 

Lake Luna Ice-benches. — Finely preserved examples of these benches are exposed on the 
west side of Ben More, rising from the shore of Lake Luna to the summit of the range, where 
they stand out in fine relief in their carpet of yellow tussock. (See Plate XII.) 

Thirty or more benches or shelves can be distinguished when standing on the west side 
of Lake Luna, the uppermost being as sharply defined as the lowest. They are horizontal or 
gently undulating, and many have an undrained hollow behind them. They vary from a few 
yards to 50 yards wide, and from .30 ft. to 70 ft. high, although some are lower and others 
higher than these limits. The lower terraces are the highest and widest. The rock in which 
they are excavated is a moderately hard cjuartzose mica-schist. 



32 

It is noticeable that all the rock-benches contour round the inequalities mi the slope on 
which they are impressed. The mechanics of their excavation is difficult to understand ; but 
it is almost certain that all were carved out at the same time, for it is impossible to conceive 
that each shelf can represent a separate epoch of advance and recession of the ice-sheet during 
the period of glaciation. 

These beautifully preserved rock-shelves present as fine an example of ice-erosion, or, more 
properly, ice-shearing, as there is recorded in the literature of geology. They are probably 
unique, and are certain to be of much interest to glacialists in all parts of the globe. 

Mammdlated Slopes of Coronet Range. — The crescent - shaped tussock - covered slopes 
of this range fronting the Arrow Cirque, almost from the level of Millar's Flat to the saddle 
on the road leading over the range to Skipper's Point, are t«rraced with long lines of ice-formed 
benches, many of which have undrained hollows behind them. On approaching the saddle, 
the continuous benches and low horizontal ridges are replaced by rounded knobs that impart 
a beautifully mammillated appearance to the higher slopes of the range. The country rock 
is a weak, rather friable mica-schist, and in almost all the hummocks and benches examined it 
was found to be broken and shattered, and, where not shattered, always much bent and 
crumpled by the weight of the ice-sheet. 

Glaciated BemarJcables. — The benches on the slopes of the Remarkable Mountains near King- 
ston, although not so distinct and continuous as those at Lake Luna, are nevertheless notable 
examples of ice-erosion. They extend from the level of the lake to the summit of the range, 
which in the glaciated portion reaches a height somewhat exceeding 6,500 ft. above the sea. 

Ice-benching on Concave Slopes. — It is noticeable that the benches and ice-terraces are in all 
cases most strongl)^ impressed on the concave side of the faces against which the ice-floe was 
directed in its downward course towards the lowlands. The inner or convex side is commonly 
worn into smooth, even, biUo^vy slopes. It is not certain whether this can be applied as a 
broad generalisation in all glaciated lands, but it is a point that should not be lost sight of 
in future investigations. 

IcE-cuT Platforms. 

The best example of a broad ice-cut rock-platform is what is knowni as the Crown Terrace, 
which extends along the foot of the Crown Range from Arrowtown past Mount Beetham to 
the Kawarau Gorge, a distance of some six miles in an unbroken stretch. It varies from 
half a mile to two miles wide, and is covered with a thin mantle of glacial till, of which the 
pebbles and boulders are mainly greywacke. In a few places on the Arrow face of the terrace 
there is a layer of schistose glacial drift, consisting chiefly of large fragments of micaceous 
quartz-schist, chlorite-schist, and quartz, with only a small percentage of water-worn grey- 
wacke gravel. In this drift, which has the appearance of a ground-moraine or a moraine that 
has been overrun by ice, there are a few very large masses of greywacke, one of which weighs 
about 80 tons. 

The Crown Terrace is excavated in the solid rock, and lies from 600 ft. to 700 ft. above the 
Arrow Flat — that is to say, it lies at the same level as the floor of the old Arrow glacial valley, 
and is merely the eastern continuation of that old floor, having been excavated by the Arrow 
glacier, one branch of which entered the great Arrow Cirque at Arrowtowni, while the other 
passed round the back of Mount Beetham, and thence crept eastward along the foot of the 
Crown Range, against which it was pressed by the united Shotover and Kawarau glaciers. 

The floor of the Arrow glacial valley stood some 700 ft. above the floor of the Arrow Cirque, 
relatively to which it was a hanging-valley. The Arrow glacier, on meeting the great glacier 
occupying the Arrow basin, was deflected sharply to the east, and, following the general 
direction of flow of the ice-sheet, ploughed its path along the base of the Crown Range, its 
work resembling that of a coal-cutting shearing-machine making a horizontal cut. The 



Pl.A'I'K XXI. 




I'm; i:SL.\>U, J^AKK \\ AKATIPU, ICE-^HOKN IXTO Vl.AT PlATFOKM. 
I'liufo Jaiinii I'(ii/\\] 




lcE-\VOI:.\ AMj SililATED liUCK-SfKFACE, Bob's CoVE 



I'IkiIii Juinei Par/:.] 
liuUctin Xo. 7.] 



[To fact p. 33. 



33 

face of the Crown Terrace fronting the Arrow River shows traces of horizontal grooves and 
benches that were probably excavated by the ice-sheet that forced the Arrow glacier against 
the Crown Range. 

It has been mentioned elsewhere that the slopes of the Crown Range behind Mount 
Beetham still show the remains of an ascending succession of narrow rock-benches that are 
fairly well preserved in places. These were doubtless the work of the Arrow glacier. 

A diagrammatic section from the Crown Range across the Crown Terrace to the Arrow 
Flat is shown in Fig. 7 below. 

Crorvn, Jtange 

CroY/rv Terrcjuce. 

Arroyv Rvver 



Arrow Fhat 



Lake. Hayes 




Wi^ 



sw 



Pig. 7. Diagram showing Crown Terkack Rock-platform, Arrow Fi.at, and Lake Have.s Basin. 
The rot'k is a soft friable inica-scUist, belonging to the Maiiiototo Series. 



Pig Island, in the upper reach of Lake Wakatipu, has been ice-planed down to a flat plat- 
form only a few feet above the surface of the water. If the lake were drained dry this island 
would present the appearance of a table-topped ridge. The low relief to which it has been 
reduced by ice-erosion is well shown in Plate XXI. 

StKIATKD Sl'KFArES, AND DlRKC'llON OK StRI.K. 

On an outcrop of quartzose mica-schist in the paddock lying in front of the Presbyterian 
Church at Arrowtown the stri<e have a bearing of 26°, measured from the true meridian — that 
is, the path of the glacier occupying the Arrow Cirque was from Lake Hayes north-eastward 
towards Arrowtown, and the evidence of the striie coincides with that of the distribution of 
the erratic ice-borne greywacke drift. In considering the direction of flow of glacier-ice in 
a confined basin or cirque like that of the Arrow Flat, which was the meeting-place of the 
Kawarau, Shotover, and Arrow glaciers, we must always bear in mind that, while the general 
trend of the ice-sheet was eastward — that is, from the high lands, where it had its source, 
towards the sea — there would be portions of the ice that would follow devious ways, 
according to the contour of the obstructions met with, in the way that protruding ledges 
and depressions in the bed of a stream are known to cause the formation of cross-currents, 
eddies, and swirling water-pools. 

The longer axis of the great perched erratic near Hogan's Road runs nearly east and west, 
and the direction of the stria; is parallel to this axis. Hence we may safely conclude that, if 
the erratic occupied the same position when locked in the floor of the ice-sheet that dragged 
it along as it now does as it rests on the narrow ridge on which it is perched, the flow of the 
ice was approximately east and west. The erratic is greywacke, transported from the Hum- 
boldt or Living.stone Mountains across Lake Wakatipu to the Arrow Flat. The path'of the ice 
that carried it must have been from west to east — that is, parallel to the main axis of the 
erratic and its engraved striae. 
3 — Queenstown. 



34 

In a narrow gulch sluiced out of the terrace fronting the lake near Bob's Cove there is 
a large rounded boss of quartzose mica-schist that is finely striated over an area of 800 square 
feet. This ice-planed and striated outcrop is situated some 15 chains from Mr. Burrough's hut, 
and 10 chains back from the beach. (See point marked A on Plate XXVIII.) WTien 
following up the gulch, the outcrop is found standing up as a high bold face on the right or 
east side. The preservation of the striae was due to the covering of alluvium, which pro- 
tected the surface of the rock from weathering. 

This is the largest and finest striated rock-surface known in New Zealand, and there is 
good reason for the belief that further sluicing would uncover a much greater striated surface 
than that now exposed. Striated boulders and pebbles lie scattered around the ice-worn 
outcrop in great profusion. 

The general trend of the ice-strige here is from south to north, the ice-grooving being in all 
probability the work of the lateral ice-stream that left the main Wakatipu glacier at this 
place and flowed northward through Lake Dispute Valley and across the low pass to Moke 
Lake. 



Fig. 8. Section showing Ice-striated Rock-surface near Bob's Cove. Looking down Gulch 

TowAEDS Lake Wakatipu. 

a. Alluvial drift. b. Marly clays of Tertiary Series. c. Quartzose mica-.schist of Kakanui Series. 

Slope and Ceag. 

The pecidiar configuration of the isolated ridges and hills lying between Lake Wakatipu 
and Arrow River affords unrivalled evidence of the intense abrasion to which obstacles in the 
path of the great ice-sheet were subjected during the glacial period. These ridges commonly 
present a long, smooth, gradually ascending slope on the side that faced the ice-flow, while 
the opposite side, protected from abrasion, is steep and rough. The long, smooth, glaciated 
slope is what is known as the stoss-seite, and the steep craggy side as the lee-seite. In nearly 
all cases the long slope has fine flowing contours, and is commonly covered with a thin mantle 
of boulder-clay. 

Queenstown Hill ; Fortification or Ferry Hill, situated between Lake Johnson and the 
Shotover ; Cave Hill, also called Slope Hill, lying between the Shotover and Lake Hayes ; 
and Morven Hill, immediately east of Lake Hayes, all exhibit this feature in a very marked 
degree, Slope Hill and Ferry Hill, as seen from Arrowtown Road, being perhaps the best 
examples. 

The glaciated hill lying on the south side of Frankton Arm, named the " Crag-and-Tail," is 
a typical example of the slope-and-crag phenomenon of ice-erosion. Its beautiful ascending 
ice-smoothed slope and steep crag can be well seen from the Frankton Road at any point 
half-way between Queenstown and Frankton Flal. (See Plate XXII.) 

At the foot of the long slope, or stoss-seite, there is commonly a hollow or basin. Thus, at 
the foot of the Crag-and-Tail we have Lake Wakatipu ; at the foot of Queenstown Hill, 



36 

the arm of that name ; at the foot of Ferry Hill, Lake Johnson ; at the foot of Slope Hill, 
the Shotover Valley ; and at the foot of Morven Hill, Lake Hayes. 

The islands in Lake Wakatipu during the period of glaciation penetrated the bottom of 
the Wakatipu glacier like the plalten of the modern Swiss glaciers, and were on this account 
subjected to intense erosion. They also exhibit the slope-and-crag feature, which is always 
characteristic of extreme glaciation. The islands in Lake Wanaka, as well as Mount Iron at 
the south end of that lake, also present the same configuration. 

Thickness of Ice-sheet. 

The marks of ice-abrasion, in the form of manimillated and terraced slopes, are seen on 
the Remarkables from the surface of Lake Wakatipu up to a height of over 6,500 ft., and on 
the Eyre and Richardson mountains up to 6,000 ft. The dome-shaped crests and terraced 
slopes of the Crown, Wakefield, Macandrew, and Coronet ranges tell us that even the highest 
peaks w-ere overridden by a continuous ice-sheeet of continental dimensions. But how far 
the surface of this ice-plateau stood above the 6,500 ft. contour is a matter of almost mere 
conjecture, in the present state of our knowledge with regard to the digging and abrasive 
power of glacier-ice. 

In the Arrow Cirque there stood a thickness of ice that we know exceeded 5,000 ft., a 
mass capable of exerting a compressive stress exceeding the ultimate crushing-strength of 
the weak mica-.schist in that area. In such a case we have no difficulty in understanding 
the genesis of the mammillated floor over which the ice slowly moved in its seaward course. 

What we cannot satisfactorilv determine is the thickness of ice that stood over the 6,500 ft. 
contour of the Remarkables. An examination of our modern glaciers shows us that a con- 
siderable thickness of ice seems incapable of abrading or modifying to any extent the surface 
over which it slowlv glides, even when carrving a load of rock-fragments locked in its under- 
surface. From this premi.se we are compelled to conclude that the thickness of ice above the 
summit of the southern half of the Remarkables must have been very considerable — sufficient, 
at any rate, to give the necessary compressive stress to furrow and sculpture the mountain- 
summits at 6,500 ft., as we now see them. 

The country rock is a semi-metamorphic mica-schist, often friable and crumbling on 
weathered surfaces ; but when worn down to the fresh rock, as it would be by ice-abrasion 
during the glacial period, it is found to be tough and resistant, as strong perhaps as the 
sandstones used for building purposes in Great Britain — such as the Arbroath, Dean Forest, 
Polmaise, Blue Hailes, Darlev Dale, and other well-known building-.stones — possessing an 
ultimate crushing-strength varying between 400 tons and 600 tons per square foot. 

These sandstones, it .should be noted, are only of moderate strength compared with such 
rocks as the Potomac Red Saiidstone of United States, with a crushing-strength of 1,22.3 tons, 
and the Molasse Sandstone of Kempten, 1,850 tons per square foot. The crushing-strength of 
Welsh clay-slate ranges from 700 to 1,000 tons per square foot, and the mica-schist of Scot- 
land from 400 to 650 tons. 

If we a.ssume that the mica-schist of the Remarkables is not more re.sistant than, say, the 
soft band of Chilmark Stone, of Tisbury, in Wiltshire — a weak building-stone somewhat re- 
sembling our Waikawa stone, with a crushing-strength of 100 tons per square foot — it is 
obvious that it would require a thickness of .3,500 ft. of ice to exert a pressure above the ulti- 
mate breaking-strength of the schist. But we have no warrant in supposing that any such 
thickness of ice existed above the 6,500 ft. contour. It seems impossible to avoid the conclusion 
that the sculpturing performed by moving ice must be mainly due to the abrading action of 
the rock-fragments locked in its lower surface, like the cutting-action of diamonds set in the 
soft-iron crown of a boring-rod. Without the requisite pressure on the revolving crown, the 
3' — Queenstown. 



36 

diamonds will not bite. Moreover, for effective work the pressure on the crown must be 
regulated to the hardness of the rock being bored. 

Pure water is a perfect lubricant, and, even when running at a high velocity, exerts prac- 
tically no erosive action on its channel. The cutting-power of running water is almost entirely 
dependent on the abrasion caused by the transported material. 

In like manner our New Zealand experience of valley-glaciers shows that a considerable 
thickness of ice, containing no subglacial debris, may glide^over its bed without modifying the 
surface on which it rests to any appreciable extent. 

It seems improbable that moving ice will abrade its bed, unless the pressure of its own 
mass is sufficient to force the transported rock-fragments into the yielding surface below. 

It is well known that even a revolving rod of soft iron will cut the hardest rock if sufficient 
pressure is exerted on it ; and in the same way a moving sheet of ice should be capable of 
abrading its bed if the gravitational stress due to its mass exceeded the ultimate strength of the 
bed-rock. The rock-surface would fail and crumble, and the removal of the abraded material 
by subglacial streams would expose fresh surfaces, so that in time extensive rock-planing 
might take place through this cause, operating either alone or in conjunction with the dis- 
integrating action of alternating freezing and thawing. 

It will be seen from the foregoing that we are almost entirely without data that would 
enable us to estimate even approximately the thickness of ice that stood over the summit of the 
southern portion of the Remarkables, often spoken of as the Hector Range. It is doubtful 
whether the thickness exceeded 1,500 ft., although it might very well have been much greater ; 
but it is equally improbable that it was less than 750 ft. during the period of maximum re- 
frigeration, judging from the strongly marked evidences of ice-erosion found on all the moun- 
tains above the 5,000 ft. contour. 

Taking a thickness of 750 ft. as surmounting the 6,500 ft. contour, we get a maximum 
thickness of ice in the Wakatipu basin of 7,490 ft., computed as follows : — 

Hector Range, ice-eroded to . . . . 6,500 ft. above sea-level. 

Floor of Lake Wakatipu . . . . . . 240 ft. below ,, 

Thickness of ice-plateau above summit of Hector 

Range .. .. .. .. 750 ft. 

Total .. .. .. .. 7,490 ft. 

The thickness of ice in the Arrow basin, which lies at a height \arying from 1,200ft. 
to 1,400 ft., on this basis would be some 6,200 ft. Even assuming that the surface of the 
ice-plateau did not rise above the crest of the Hector Range — although we know that it must 
have done so — we get a maximum thickness of 6,740 ft. in the Wakatipu basin and 5,540 ft. in 
the Arrow basin, the latter exceeding the computed maximum thickness of the continental 
ice-sheet covering Scotland in the glacial epoch of the Northern Hemisphere. 

The Motion of Glaciers. 

The first true conception of the physics of glacier-ice was due to the genius of Canon 
Rendu,* afterwards Bishop of Annecy, who, in a memoir on the " Theory of the Glaciers of 
Savoy," contended that ice possessed a certain plasticity which enabled it to mould itself 
to its surroundings. Glaciers were, he argued, " rivers of solid water " ; and, further on, 
when discussing the motion of what he terms stream-glaciers — now known as valley-glaciers — 
he says, " There is between the Glacier des Bois and a river a resemblance so complete that it 
is impossible to find in the glacier a circumstance which does not exist in the river." 

Soon after — that is, in 1842 — Principal James Forbes, the physicist, of Edinburgh, as 
the result of careful theodolite measurements made on the Mer de Glace, established the fact 



* TkL liC Chanoine Rendu. " Theorie des Glaciers de la Savoie," Mem. Soc. Acad. Savoy, x, 95, 1841. 



37 

that glaciers moved mere rapidly in the middle than at the sides and bottom ; and from these 
premises contended that glacier-ice, or firn, notwithstanding its brittleness and hardness, was 
in reality a slightly viscous mass, which flowed downward under the influence of gravity, like 
a stream of lava. Forbes's theory of ice-plasticity now finds general acceptance among 
geologists and physicists. 

The movement of a glacier, like that of all viscous fluids, is now conceded to resemble 
in nearly all respects the flow of a river. For example, as proved by Forbes, the central por- 
tion of the surface travels more quickly than the sides or bottom ; and at the bends the rate of 
flow is greatest at the inner or convex side, and least at the outer or concave side. Like water, 
a thick stream of ice will flow faster than a thin stream on the same gradient. And, while the 
retardation of flow of a river at the sides and bottom due to frictional resistance is great, 
in a semi-solid like ice it must be enormous. The differential surface flow of a glacier is shown 
in the next diagrammatic plan, where the shaded lines enclose a glacier-bed of uniform cross- 
section having the same gradient throughout. 




Fig. 9. Plan showing Differential Surface Flow of a Glacier. 



The minimum flow is at the sides, being represented by the displacement 06, while the 
maximum flow is at the centre, being represented by the horizontal displacement do. As a 
matter of actual experience it is found that, while the least flow is at the sides and the greatest 
at the centre, the flow at any point of the cross-section is liable to be modified considerably 
by the contour and gradient of different parts of the glacier- bed. 

The differential rate of flow as between the surface and the bottom is shown in the next 
figiire, which represents a longitudinal section of a glacier. 




- ///7/ } //^^^ y/ // rr^/y>y>''y'/y'y//''/// 



Fio. 10. Longitudinal Section showing Differential Flow of Glacier as between Surface and 

Bottom. 



In the above figure ah represents the amount of horizontal flow or displacement at the 
bottom of the glacier, and ac the amount of flow at the surface in the same unit of time. 



38 

As the rate of flow is unequal, there will be a two-fold effect produced in the glacier : 
in the first place the upper layers of ice will overflow or override the lower, like the beams of 
a cantilever bridge, thereby throwing a greater compressive stress on the bottom layers ; and 
in the second place the retardation of the lower layers will tend to cause rupture of the upper 
layers by tensional stress, which will result in the formation of a series of fissures or crevasses 
more or less at right angles to the line of flow. Such fissures will be widest at the surface, 
gradually narrowing in depth, and ending on reaching the zone of compressive stress. Thus 
it will be seen that for dynamical reasons it is unlikely that a crevasse should extend down to 
the bottom of a glacier of any magnitude. 

Water placed on a plane descends through the action of gravity, the movement being 
due to the molecules sliding over each other. The author agrees with Professor Heim that 
gra\aty is the force which causes motion in a glacier. 

According to Tyndall, the motion of glaciers is caused by fracture and regelation. That is to 
sai', he believed the motion to be mainly mechanical rather than molecular. But his explana- 
tion, although it has received the support of many eminent authorities, is not very convincing. 
Fracture and regelation may possibly be the character of the motion, but it is impossible to 
conceive that they can be the cause. Take a uniform beam of steel, and rest it on supports ; 
let the beam support no weight but its own mass ; in course of time the beam will bend and 
become deformed under the stress of gravity — that is, under the influence of gravity the metal 
tends to flow along the plane of least resistance, until a permanent deformation takes place. 
No fractures appear on the surface of the metal, the flow being molecular and not mechanical. 

The author has found by experiment that a uniform beam of ice placed on supports 
without a load slowly bends and becomes deformed, in the same way as a bar of steel or 
iron, without showing any evidence of fracture or even of external strain. Ice is a homo- 
geneous substance, and there seems no valid reason to suppose that the flow is other than 
molecular, as it is in all viscous bodies. 

Professor F. D. Adams, of McGill University, in some recent experiments on rock-flowage 
by the exercise of pressure, has shown that cylinders of Carrara marble, when enclosed in 
jackets of tough sheet-iron, and subjected to irresistible but increasing pressure, have passed, 
without cracking in their yielding jackets, from an inch in height to discs of half this altitude 
and of correspondingly increased diameter. The cylinders did not lose their cohesion, but 
moulded themselves like so much wax. When removed from the jackets the discs were 
found to be as solid and homogeneous as were the original cylinders. 

The difference between the flow of a liquid (a viscous body) and a solid is one of degree 
only, for while water is rapidly, and viscous bodies slowly, displaced by gravitational stress 
alone, such rigid bodies as crystalline rocks can be made to flow like viscous masses when 
subjected to sufficient compression.* 

From almost all points of view we must regard glacier-ice as a viscous body that obeys the 
fundamental laws of hydrodynamics. 

The Excavating-power of Glaciers. 

This is a subject on which there is still much difference of opinion. Subalpine lakes 
were claimed as the result of glacial excavation by Ramsay as far back as 1862,t but this view 
was not indorsed by liis contemporaries Lyell and Murchison. At the present dav, Bonney, 
Heim, and other distinguished glacialists, while admitting that glaciers are capable of wearing 
down the asperities of a land-surface, and of grooving, rounding, and planing all prominent 
obstacles that happen in their path, deny the power of ice to create new features. It can 



* Professor J. F. Kemp. Mining and Scientific Press, 11th April, 1908. 
f Quart. Jour. Gaol. Soc, London, 1862, p. 185. 



39 

only, they contend, modify pre-existing land-forms, but cannot excavate rock-basms. On 
the other hand, such eminent geologists as Geikie and Penck are equally strong supporters of 
Ramsay's views. 

After a prolonged examination of a region that has suffered profound glaciation, the 
author finds himself with a distinct leaning towards the views of Ramsay. 

A hoe that is dragged along the ground does no useful work — it does not even abrade ; 
but by exerting pressure on the handle it is made to scoop out the soil in its path. A glacier 
may be compared to a graving-tool, and, except its own mass is sufficient to exert an irresis- 
tible pressure, it will glide over or merely smooth or polish the surfaces over which it 
passes. 

A summit-glacier, by reason of its wide sectional area and relatively wide bearing-sur- 
face, does not abrade the surfaces on which it rests. Its thickness can commonly be measured 
in hundreds and not in thousands of feet. It carries no rocky load on its back ; and its method 
of wearing down and modifying its bed is by picking up the loose frost-shattered fragments 
of rocks in its path, and carrying them forward to its terminal face, whore they are piled up 
like a huge talus. But it does not abrade, and for this reason striated stones are rarely found in 
the transported debris. The pressure of its mass relatively to its rubbing-surface is too little to 
cause abrasion, mucli less gouging or scooping. 

Similarly, a valley -glacier with a wide bearing-surface relatively to its depth is incapable 
of exerting a scooping action. It does not always abrade, and in many of our mountain- 
valleys occupied by shrunken glaciers at the upper end it would be dillicult to trace the 
former extension of the ice but for the morainic debris scattered along the tioor of the valleys. 
None of the existing glaciers in New Zealand are capable of excavating their bed, and it is 
doubtful if any in Europe or America are more competent to do so. 

It is obvious that a glacier can only excavate when a certain relation exists between the 
pressure of its mass and its sectional area. A sharpened carpenter's chisel, witli a sectional 
area of, let us say, one-thousandth of a s(iuare incli, will cut effectively with a pressure of 
40 lb. exerted on it, while the same chisel blunted so as to present a sectional area of ten- 
thousandths of a square inch with the same pressure will only scratch the surface of the wood. 
The chisel is only able to gouge a hole when the pressure exerted on the cutting-edge in a 
unit length of time so far exceeds the ultimate strength of the wood as to cause rupture of the 
resisting fibres. It is equally certain that ice can only excavate its bed when the pressure of 
its mass exceeds the ultimate crushing-strength of the bed-rock. A thickness of 4,000 ft. 
of ice is capable of exerting a pressure of about 100 tons per square foot, and 6,000 ft. a pressure 
of 150 tons per square foot. 

The mica-schist in the Wakatipu V)asin has a crushing-strength that probat)ly exceeds 
100 tons per square foot when the rock is lying horizontally, but the load to cause the rock 
to fail will be much less when the strata are tilted so as to present an inclined edge to the 
pressure-load. It has been proved experimentally that a rock possessing a crushing-.strength 
of 200 tons to the square foot will fail with a load of 100 tons when set at an angle of 30° to 
the line of force, and with a load of 75 tons at an angle of 60°. 

From this it will be seen how incapable the pigmy valley-glaciers of to-day must be to 
excavate their bed. As gouging-instruments they are sufficiently rigid, but deficient in mass. 
With the superadded weight of the continental ice-sheet of the glacial period they would be 
converted into effective excavators. 

A glacier is one of Nature's graving-tools. Even Ruskin, while doubting the power of 
ice to excavate rock-basins, admits " that a glacier may be considered as a vast instrument of 
friction — a white sandpaper applied slowly but irresistibly to all the roughness of the hill 
which it covers." Why, then, should we deny it the capacity to wear away the surface, and 
thus form basins, if sufficient pressure be exerted upon it for long enough ? A continental 



40 

ice-sheet, such as that which covered Otago and Southland and the greater part of the South 
Island, would certainly exert sufficient pressure to cause the glaciers or ice-coulters flowing 
through the narrow gorge-like valleys that prevail in the Wakatipu district to deepen their 
beds in favourable places, not so much by scooping as by the furrowing action due to the 
irresistible surface-abrasion. Moreover, any structural weakness that might have caused, 
or contributed to, the original selection of the site of the valley prior to the glacial epoch 
would also assist the glacier in its work of excavation. 

It is not a little singular that Lake Wakatipu, as well as all the smaller lakes, lie in 
narrow gorge-like valleys of small sectional area relatively to the height of the enclosing 
mountains. 

It does not necessarily follow that the Wakatipu glacier, when it was surmounted by 
and formed part of the great ice-plateau of Central and Western Otago, excavated the rock- 
basin in which the lake now lies. We know that the Wakatipu Valley existed prior to the 
glacial period, and there is good reason for the belief that its origin has a close relationship to the 
powerful faults that traverse each of the main arms of the lake. Not only did the valley 
exist, but it is possible, or perhaps even probable, that a lake occupied a part of the floor of 
the valley before the advent of the ice. The dominant lines of dislocation following the course 
of the valley, and the work already performed by the great river draining the valley, would 
render the task of the glacier in excavating its bed to the present depth of the lake less formid- 
able than it might at first appear to be. Moreover, it must not be forgotten that the depth 
of the Wakatipu rock-basin is but a small fraction of the total depth of the ice that at one 
time stood over it. 

Lakes Luna, Hayes, Moke, and Johnson are only exaggerated rock-tarns scooped out by ice 
in the floor of the valleys in which they lie. That some of them lie in the track of faults is 
not the cause of their formation, although the faults doubtless played a part in determining 
the situation and direction of the pre-glacial valleys in which these lakelets lie. 

The Northern Limits of Ice-sheet. 

The evidences of former glaciation are to be found from one end of the South Island to 
the other. In the region lying between Preservation Inlet and Dusky Sound the mountains 
have been eroded down to a sloping plane of moderate relief. In the mountainous area lying 
between Dusky Sound and Awarua Bay, in the rounded flowing outhnes of the land-forms, 
in the deep fiords, hanging-valleys, corrie-lakes, ice-cirques, and coastal moraines we have ample 
proofs of a vast overriding sheet of ice. The evidences that a continuous ice-sheet stood over 
the Wakatipu region have already been narrated. The same proofs can be traced along the 
main axial divide until we reach Boulder Lake, in ColUngwood Comity, in the northern part 
of Nelson, with its rock-cut basin, roches moutonnees, and moraines. 

Seventy miles south of Boulder Lake we have Lake Rotoroa and Lake Rotoiti, both of 
which lie in rock-basins that are partly dammed up with morainic matter. The terminal 
moraine at the south end of Rotoiti is of vast proportions. 

The piles of morainic and fluvio-glacial material, often mingled on the sea-face with marine 
sediments, afford conclusive proof that the glaciers reached the sea on the west-coast side 
of the South Island in the glacial period. 

Evidence of a similar kind is not wanting on the east coast. Thus, the smooth rounded 
contours of the ranges and hills lying between Lake Wakatipu and the sea, the thick sheet of 
boulder-clay covering the Henley Hills and the area between Saddle Hill and Dunedin, and 
the silts and glacial till covering the Oamaru and Timaru areas afford convincing proof that 
the glaciers also reached the sea on the east coast. 

The ice-sheet seems to have reached its northern limit near Cook Strait 



41 

Age of New Zealand Glacial Period. 

In the Wangauui portion of the Province of Wellington we find a great succession of 
fossiliferous marine beds that date from older PUocene up to the Pleistocene, with no evidence 
of a stratigraphical break. 

The youngest marine beds known in the South Island are the Awatere beds in Marlborough 
and Greta beds in North Canterbury. These beds are older Pliocene. They are not known 
elsewhere in the South Island. 

The absence of marine beds of younger Pliocene age in any part of the South Island, 
and the absence of all beds of older Pliocene age south of Waipara, give clear proof of a differen- 
tial elevation of the South Island soon after the Miocene, the movement pivoting on the north 
end of the Island, being greatest in the south and least in the north. The absence of newer 
Pliocene beds shows that the elevation of the northern end was complete before the advent 
of that period. 

The elevation of the land began in the newer Pliocene, and was accompanied by refrigera- 
tion that appears to have reached its maximum in the older Pleistocene, and it was doubtless 
in this period that the ice-sheet reached its northern limit. 

After the retreat of the ice-sheet the mountain valleys and basins were still occupied by 
glaciers, some of which may have continued to extend as far as the sea for a time. But it is 
obvious that the amelioration of climatic conditions that caused the melting and recession of 
the ice-sheet could not be long in exercising a similar effect on the valley-glaciers, which soon 
began a grand retreat that did not cease until the confines of the mountain fastnesses were 
reached. There a halt was called, and behind piles of morainic material the glaciers made a 
stand of considerable duration. There is evidence that on two occasions* at least successful 
sallies were made beyond the sheltering ramparts ; but the ground so gained could not be 
held. In a contest so unequal, retreat was inevitable. After the last sally, the now 
greatly attenuated glaciers began the la.st and final retreat, which ended in the total 
destruction of all but the few that were able to chng to the protecting flanks of the main 
alpine divide. 

It was during the last retreat that New Zealand witnessed a period of hitherto un- 
paralleled- fluviatile activity. In this fluvial period — that is, in the newer Pleistocene — were 
formed the gravels of the Moutero Hills in Nelson, of the Canterbury Plains, the Southland 
Plains, and the inland basins of Canterbury and Otago. Contemporaneously with these 
were formed the great fluviatile and fluvio-glacial coastal terraces of Westland. 

The Cause of the Glacial PERroD. 

The refrigeration and later Pliocene elevation of the South Island were concurrent, a fact 
which makes it difficult to avoid the conclusion that the refrigeration was in part at least a 
result of the elevation. 

When we examine the present-day conditions of glaciation in temperate regions we find 
that altitude is the dominating factor. Take the case of the New Zealand Alps, lying at our 
door. Here we have a block of mountains ranging from 8,000 ft. to 12,000 ft. high, that 
supports a number of valley-glaciers of considerable size. On the other hand, in the Wakatipu- 
Wanaka region, where the height of the mountains ranges from 6,000 ft. to 9,000 ft., we have 
no valley-glaciers, notwithstanding an equal precipitation and a mean annual temperature 
at least 1° Fahr. lower, resulting from the higher latitude. Only in two places do we find 
summit-glaciers — namely, at Mount Aspiring, 10,000 ft., and Mount Eamslaw, 9,000 ft. 
high. 



♦ James Park. " Geology of Alexandra Sheet," Bulletin No. 2 (New Series), N.Z. G.S., 1906, p. 11. 



42 

The mean height in the Mount Cook region may be taken at 10,000 ft., and in the Waka- 
tipu-Wanaka area at 7,500 ft. Before considering these regions on equal terms we must 
first eliminate the difference of refrigeration due to latitude by applying the equivalent in 
height. 

If we take the usual temperature-gradient of 1° Fahr. for every 300 ft. in height, we get 
300 X 1 = 300ft. Then, 10,000—300 = 9,700, and 9,700 — 7,500 = 2,200ft., the height 
that would need to be added to the Wakatipu-Wanaka block of momitains to obtain valley- 
glaciers as large as those of Mount Cook region, the precipitation being taken as equal. 

Assuming that a continuous ice-sheet could not exist above a mean temperature of 32° Fahr., 
and taking the mean temperature over the South Island at 42°, we get a difference of 10°, 
which would be equivalent to a height of 3,000 ft. Have we any evidence to justify the view 
that the South Island ever stood 3,000 ft. higher than at present ? Deposition of marine 
sediments has been in progress on the southern shores of the North Island ever since the older 
Pliocene, and it seems inconceivable that any general uplift of the South Island could have 
taken place without disturbing the North Island. It is well known that the slow differential 
uplift of the South Island that began at the close of the older Pliocene did cause the eleva- 
tion of the newer Pliocene and Pleistocene sea-beaches along the shores of Cook Strait to 
a height of 300 ft. It might be argued that this uplift of 300 ft. is the equivalent of 3,000 ft. 
of elevation in Otago and Canterbury, resulting from the differential movement. 

The measure of the uplift in the south of this Island might also be looked for in the 
drowned valleys that now form the fiords of south-west Otago. These valleys are pre-glacial, 
and were probably formed during the newer Pliocene uplift. Although deeply glaciated, 
we have no reason to suppose that their present form, except in rounded outline and greater 
depth, is different from what it was in pre-glacial times. How mucb of the present depth of the 
fiords is the work of ice-excavation is unknown and perhaps indeterminate, which thus makes 
it imsafe to venture even an approximate estimate of the general uplift on this basis. 

The pluvial period, succeeding and following close on the heels of the Pleistocene recession 
of the glaciers, was one of general subsidence throughout the South Island, and it was during 
this subsidence that the great gravel plains of Canterbury and Southland were formed. It 
was this negative movement of the land in relation to the sea that gave the subglacial rivers 
of the newer Pleistocene their constructive power. 

Summarising the evidence presented in the foregoing pages we find, — 

(a.) That the Pliocene uplift of the South Island was accompanied by increasing 

refrigeration and glacier invasion. 
(b.) That the Pleistocene subsidence of the South Island was accompanied by a 
corresponding decrease in refrigeration and a recession of the glaciers. 
The relationship between elevation and the ice-invasion, and subsidence with ice-reces- 
sion, is too marked to be lightly passed over. Uplift may not have been the sole cause of the 
glaciation, nor subsidence of the land the only cause of the softening of climatic conditions 
that caused the melting of the invading ice, but that they were the dominating factors seems to 
admit of little doubt. 

An elevation of 3,000 ft. would have a far-reaching effect on New Zealand not only in 
respect to climatic conditions, but in relation to increase of area and uphft of submarine ridges 
that would tend to divert the equatorial sea-currents, and therefore cause a secondary but 
not insignificant modification of climate, which would accentuate the refrigeration due to the 
general elevation of the land. 

The refrigeration that caused the glacial period of New Zealand may be ascribed mainly 
to elevation, and partly, as contended by some in discussing the contemporary glacial period 
of Europe and North America, to a shift or wandering of the polar axis of the globe ; but of 
this last we have no evidence, except that advanced by students of gravitational astronomy. 



PLATE XXin. 




IciM'oi.isiiKD .\M) Stiuatkii I{()( k- su 1! lAci:. Uoh's C'ovi;, I-.\ki; W akai ii'u 

I'hoh, I'lul. ./. .\l,llr„lw.\ 




FalK of JjOUI.UKK-CI.AY, >i;uUiM. IIlkK SlliATlKK ATION, near FKiiXmi.I. ('(JAI.-MIXK, (7l;Lj;.\ isJ.AXi': 
Photo Jam,." Park.] DuXEDIN. 



liiilhtin No. 7.] 



PLATE XXIV. 




■^^■^. <t »-'> . ■.-TV./., 



Face of Hexley Boulder-clay, SHOwixr; Rude Stratificatiox, at Head of Gully behind Hexley 

Hotel. 

Photo A. Gordnii Mar(l<,n(ild.'\ 



UuUvtiii No. ?.] 



[To face ji. J^S 



43 

The question may now be asked, was the great ice-plateau that covered the South Island 
of New Zealand an extension of the polar ice-sheet ( It is almost certain that this must be 
answered in the affirmative, for, whatever cause or causes originated the glacial period in 
New Zealand would also operate in tlie higher latitudes. The exploring expedition of last 
November proved that the Auckland and Campbell islands had suffered intense erosion by an 
overriding sheet of ice that nmst have had a polar origin. (Articles and photographs, Otayo 
M'itness, December, 1907.) 

Henley Boulder-clay. 

This deposit possesses an extraordinary interest, from the circumstance that it affords 
conclusive proof that the glaciers of Central Otago at one time reached the sea on the east 
side of the South Island. Its glacial character has been acknowledged by Hutton,* Hector,f 
and McKay. It consi.sts of yellow and red clays mingled with small fragments of quartz and 
mica-schist, among which occur occasional largo masses of mica-schist as much as 10 ft. or 
12 ft. in diameter. It extends from Otakaia southward to Waihola, forming the low coastal hills 
lying between the Taieri Flat and the sea. Tlie main south railway to Invorcargill skirts 
it for some miles. These coastal hills rise in places to a height of nearly 500 ft., but their height 
generally lies between 250 ft. and 350 ft. On its seaward side they are covered with water- 
worn gravels. The material commonly shows no arrangement, but this is not the case everv- 
where. At the head of the small gully lying behind Henley Hotel, in the steep escarpments 
that extend to the summit of the hill, the red clays and schist-fragments are distinctly arranged 
in rude beds or layers. As seen at this place in the steep cliffs, the material has a close re- 
semblance to the boulder-clay deposits in the author's native country, especially to those 
in the valleys of the Dee and Don, near Aberdeen. 

The Henley deposit is undoubtedly of glacial origin. It is not a terniiiiiil moraine, but 
a true boulder-clay, the formation of which apj)oars to have been partly subglacial and partly 
subaqueous. 

A sheet of boulder-day of great interest covers all the hills and ridges Ix'tween Dunedin 
and Saddle Hill. It consi.sts of stiff yellow clay, which often contains boulders of basalt, 
phonolite, dolerite, and other igneous rocks. 

Outcrop Curvature. 

In the Arrow and Shotover valleys the mica-.schist is a weak rock, inclined at angles that 
range from 40° to 60°. On one side the slope of the ridges is generally uniform with that of the 
angle of dip, but on the escarpment side, where the beds are without support, it is quite 
conunon to find the rocks bent over so as to dip in the reverse way, or bent and corrugated 
so as to appear to dip in many different directions even within a small area. 

This bending of the rocks is the work of the ice-sheet that covered the mountains in the 
glacial period. It often obscures the true dip. On the slopes of the Coronet and Macandrew 
mountains, and in parts of the Richardson Mountains, it is impossible to get trustworthy 
observations of strike and dip over considerable areas. 

Exfoliation of Striated Skin of Erratics. 

The striated and polished surfaces of the large perched erratic near Hogan's Road, in 
the Arrow basin, shows a marked tendency to peel off in thin plates varying from \ in. to \ in. 
thick, the plates, like a veneer, being flat, bent, or undulating, according to the contour of the 



* Hutton. " Geology of Otago," 1875, \>. 62. 

t Hector. " Reports of Geological Expiorations," 1890-91, p. i. 



44 

striated surface. By jfently tapping tlie surface with a liaiunier the striated skin can be peeled 
ofi without much difficulty. 

An examination of the striated erratics lying on the Queenstown moraine disclosed 
the fact that they also exhibited the same tendency to peel off in thin plates. 

All the erratics are composed of greywacke of fairly even texture. They vary from a few 
pounds up to 240 tons or more in w'eight, and commonly exhibit no bedding-planes or lines of 
stratification. 

The exfoliation only takes place on the surface that has been polished and striated, and 
after the removal of the outer layer the rock exhibits no further tendency to exfoliate. 

There seems some reason to believe that the striated skin is a layer of rock that has been 
reduced to a condition of internal molecular strain by pressure or stress exerted perpen- 
dicularly to the plane of exfoliation. If this contention be true, we have in this exfoliating 
skin a remarkable example of incipient cleavage induced by ice-pressure. 



45 



CHAPTER IV. 



HYDROLOGY. 



Page Page 

Rainfall a National Asset . . 45 Gauging of Kawarau River — continued. 

Gauging of Kawarau River . . 4() Develoi)ment of Power at Falls . . 48 

Statement of De|)tli and Velocities . . 47 Discharge of Smaller Rivers and Streams 48 

Rainfall a National Asset. 

A GENEROUS rainfall, combined with a fertile soil and a temperate climate, forms the greatest 
national asset in the possession of New Zealand. At present much of the rainfall runs directly 
into the trunk rivers, and thence reaches the sea without performing any useful service to 
man. It is. however, only a matter of time when much of this surplus water will be con- 
verted to useful purposes, both in connection with agricultural and pastoral pursuits, and for 
the generation of motive power for various manufacturing industries that are now in existence 
or that will be created by the favourable conditions offered by a continuous and cheap water- 
supply. 

The water-supply of the Dominion is a magnificent national endowment in perpetuity 
that will become of increasing value in the generations to come. 

The natural fuel of the globe is becoming rapidly exhaust«d. Its exhaustion is even 
now within measurable distance. As coal becomes scarcer, water-power will more and more 
take its place, until when the day of exhaustion comes water will be the dominant motive 
power of the globe. Mountainous countries like New Zealand, that are endowed with a plenti- 
ful rainfall, are destined in the near future to become the workshops of the world. And this is 
already being realised in no small way in America, and in Norway, Sweden, Switzerland, and 
other parts of Continental Europe, where water is now being harnessed in place of steam 
for the generation of electric energy for manufacturing purposes of all kinds. New industries 
have been created and old industries rejuvenated. Streams that ran to waste for count- 
less centuries have been found, in the conditions of the new civilisation, to have a high 
commercial value — a value that can be translated into an ecjuivalent in £ s. d. 

A never-failing supply of water is one of Nature's gifts to New Zealand, which is destined 
to become the workshop of the Southern Pacific. The Dominion possesses more water-power 
than the whole of the Commonwealth of Australia many times told ; and a few generations 
will see the picturesque fiords of Otago converted into harbours throbbing with the hum and 
clang of industrial life. The rainfall is dependent on cUmatic conditions, and it may be pre 
served for all time by the conservation of the forests that clothe the slopes of the main alpine 
divide, where the water-supply is regulated by the melting of the winter snows. It may even 
be augmented by the judicious planting of trees in tracts of coimtry that are now bare of 
forests. 

The destruction of the forests in Westland, Canterbury, and Otago would be speedily 
followed by a diminution of the rainfall, and places that are now green and fertile would 
soon become arid and bare. A diminished rainfall means shrunken streams and dry water- 
courses ; for the larger streams would be decreased in volume, while the smaller would 
become dry. 



46 

Central Otago presents a dire lesson of what may happen to a region denuded of its forests. 
It was in comparatively recent times covered with a dense forest up to an altitude of 4,000 ft 
The rainfall was abundant, and the surface of the country drained by large streams that 
could be counted by the score, and brooks by the thousand. At the present time, notwith- 
standing its fertile soil and sunny, temperate climate, it is little better than a wilderness 
seamed with dry watercourses, and must remain so until the parched-up soil is watered by 
irrigation. 

The destruction of forests has a much greater significance than the immediate effect that 
results in a decrease of the rainfall. Careful and prolonged investigation in western and central 
Asia has shown that the denudation of mountainous regions of their covering of forest-vegeta- 
tion sets in motion an arid cycle of long duration, which the puny efforts of man are hopeless 
to stem. 

The preservation of our alpine and subalpine forests is a matter of national concern. 
To permit their destruction would be an everlasting crime, by inflicting a disability 
that could not but cripple the full and vigorous development of the nation for all time to 
come. 

An asset can only be appraised at its true value when it has been fully ascertained, and 
in the case of New Zealand this can only be done by the continuous record of weather- 
observations at moimtain stations, and by the systematic gauging of the flow of the rivers 
and streams. 

The Americans, with the conspicuous enterprise and judgment they have shown in 
the development of their natural resources, have for some time past possessed a 
full realisation of the immense potentialities of their water-supply, and at the present 
time the Hydrographical Branch of the Department of the Interior is the best-equipped 
in existence. WTiat has been done in America is now being imitated in parts of Continental 
Europe. 

Stream-gauging, to be of any value, must be carried on continuously through a long 
succession of years. For the most part, isolated and spasmodic gaugings have little value. 
They are only useful for comparative purposes. 

During the progress of the Geological Survey of the Queenstown Subdivision in the past 
summer, gaugings were made of most of the larger rivers and many of the smaller streams. 
The results, and the dates of gauging, are given below. 

GrAUGING OF KaWARAU RiVER. 

The gauging-station was selected at a point a few chains below the punt-ferry and half 
a mile below the Kawarau Falls, in order to be outside the influence of the rapids at the out- 
let. 

Three lines of section were staked out on known bearings. The sections were 50 ft. apart, 
and the distance across the river between the stakes was 475 links. The sections were located 
at a point where the river-chamiel was straight for a quarter of a mile above the top section- 
Une and half a mile below the lower line. 

In order to ascertain how far the river-channel was of imiform cross-section both above 
and below the mid-section, soundings were taken along each section at intervals of 25 links, 
or 16-5 ft., the distances being measured from the bank by a steel tape, one end of which was 
held in the boat and the other on the shore. 

The soundings were taken with a graduated rod up to 10 ft. ; at depths over 10 ft. a sound- 
ing-line was used.'^ The length o£ the soimding-Une was carefully checked before and after 
use, and a correction made to the different soundings. 



To accompany BuTLetirv 2^7 



Bi V- 



3/3 5 




jj Al 



U p Stream Section — 



Bri k-- 



3/3S - 




— Mid Section — 



— CROSS SECTIONS — 

— OF — 

— KAWARAU RIVER - 

— SHOTOVER S. P .— 

— Near Kawarau Falls Punt — 




FEET SO 

I I ' ' ' ' 



Scale 

so 



100 ISO 



zoon 

— I 



— Down Stream Section — 



J 



L 



n 



r 




JAMES MACKINTOSH BELL 
DIRtCTOR 




Punt Landing Stage 



%>■ 



<s. 



— PLAN 



'^^^ 


/ 




' L ^' 








/ .if 




N>/ 


-~^ 


/ 


""^^ 


/ 








<ij^ "^^rs^^ 




FEET 50 

tza I I I 



Scale 

50 KX3 ISO 200 Z50 



<?J-^ 



I -r- 



q.E.H 



By Attthority : John Mackuy. Governmtni Prtntcr. 



/ZSO .101 OS . 826 



47 



The velocity-measurements were made with bottles and with loaded rods, the latter 5 ft., 
8 ft., and 10 ft. long respectively. Two and often three measurements were taken at each 
sounding-point. 

The soundings proved the river-channel to be remarkably uniform in sectional area 
and contour, as will be seen by a perusal of the plotted cross-sections facing this page. 

The discharge has been computed in slices of 33 ft. The mean depth and mean velocity 
for each slice were found by the prismoidal formula as under : — 

a + ib + c 



dm = 



Vm = 



6 
Vrt -f- i\b + Vc 



The discharge through each strip is,- 



Q = (lm\ml. 



The mean depth and velocity in the strip near the bank was determined by the follow- 
ing formulas : — 

J a' + a ^-r Vo + Xa 

dm = — --- '• *^"' = — T — 

Where 



dm = mean depth in feet ; 
Vot — mean velocity in feet per second ; 
a, b, and c = consecutive depths at I feet apart ; 
\a, \b, and \c = observed velocities at points a, b, and c ; 
/ — the width between points a, b, and c ; 
Q = the discharge in cubic feet per second. 




Fig. 11. Showing Strips aud References used in computing the Dlscharoe of Kawarau River. 
S. ITie south bank. N. The north bank. 



Statement of Depths and Velocities. — Measurements, beginning at South Bank. 



Links. 



25 

50 

75 
100 
125 
150 
175 
200 
225 



Ft. 



16-5 

33 

49-5 

66 

82-5 

990 

115-5 

1.32 

148-5 



Mean Velocity, 

in Feet 

per Second. 



0-40 
0-61 
0-95 
1-36 
1-70 
2-05 
2-48 
2-51 
2-64 



Link.s. 

250 
275 
300 
325 
350 
375 
400 
425 
450 
475 



Ft. 

165 
181-5 
1980 
214-5 
2310 
247-5 
264 
280-5 
2970 
313-5 



Mean Velocity, 
in Feet 
per Second. 
2-73 
2-75 
2-73 
2-56 
2-24 
1-83 
1.36 
0-80 
0-34 
0-00 



48 

The mean depth, mean velocity, and the discharge of each strip, deduced from the above 
figures, are as follows : — 



Strip. 




Mean Velocity, in Feet I Discharge, in Cubic Feet 
per Second. per Second. 



1 




20 


2 




81 


3 




20-9 


4 




2.3-7 


5 




28-8 


6 




300 


7 




30-8 


8 




310 


9 





11-8 
3-7 



0-20 


6-60 


0-53 


141-66 


1-39 


958-78 


206 


1,611-12 


2-53 


2,40i-51 


2-72 


2,692-80 


2-70 


2,744-28 


2-22 


2,271-06 


1-39 


541-26 


0-37 


44-88 




13,416-95 



Total 



Thus we find that the discharge of the Kawarau amounted to the great volume of 13,417 
cubic feet per second. 

The gauging of the middle line of section was done on the 11th March, 1908, and a datum- 
mark was cut into a stout blue-gum pile at the punt-platform, or landing-stage, on the north 
bank of the river. 

A graduated plank has been fixed near this datum-pile, the 4 ft. mark on it corresponding 
to the datum of the gaugings taken on the above date. The river is not known to the oldest 
settler in the district to have fallen so much as 4 ft. below the datum, nor to have risen more 
than 6 ft. above it, which is the limit of the graduations. 

Development of Power at Falls. 

On the 11th March there was a difEerence of level of 5 ft. between the surface of Lake 
Wakatipu and the surface of the Kawarau River below the rapids at the outlet. With this 
fall a turbine would develop, with a discharge of 13,000 cubic feet per second, as much as 
6,000 brake horse-power. But this amount of power could not be obtained continuously, as 
the damming back of the Kawarau by the Shotover during times of flood destroys the avail- 
able head. For intermittent work the power would be of great value. 



Discharge of Smaller Rivers and Streams. 

The date of gauging, weather, and other conditions, as well as the discharge, are given 
in the following tabulated statement : — 



Date 




Discharge, in 




of 


Name of Stream. 


Cubic Feet 


Remarks. 


Gauging. 




per Second. 




1907. 








Nov. 12 


Coronet Creek . . 


5-00 


Fed by melting snow. 


„ H 


Scanlon's Creek 


3-75 


j» j> 


„ 15 


Bush Creek, above Macetown 


400 


5> >» 


„ 15 


Goldburu (Twelve-mile) . . 


1800 


,1 9> 


„ 15 


Arrow River, above Macetown junc- 
tion 


65-00 


t> i> 


„ 20 


Bracken's Creek 


3-00 


>J >» 




o 



CO 

q 



E-< 



=3 



49 



Discharge of Smah-lek Eiveks and Streams — continued. 



Date 




Disobarge, in 






of 


Name of Stream. 


Cubic Feet 


Remarks. 




Gauging. 




per Second. 






1907. 


i 




1 




Nov. 21 


Bush Creek, at Arrowtown 


6-25 


, Fed by juelting snow. 




Dec. 7 


Soho or Roaring Billy 


1200 


99 99 




1908. 










Feb. 6 


Roaring Meg (Skipper's) . . 


215 






.. 6 


; Old Man Creek 


115 






„ 6 


Right-hand Branch of Skipper's Creek 


900 


Fed by melting snow. 




„ 7 


Butcher's Creek. . 


3-25 


At the minimum summer 


flow. 


„ 7 


Skipper's Creek, at mouth 


U-50 


„ 




„ 7 


Main Branch, above Roaring Meg. . 


415 


»? »» 




„ 8 


Yates Creek (a branch of Stony Creek) 


1-50 


,, ,, 




„ 8 


Morgan's Creek . . 


200 


,, „ 




» 8 


Stonv Creek . . " . . 


2800 


Melting snow. 




» 8 


Gilbert Creek . . 


4-25 






„ 9 


Davidson's Creek 


115 






,, 10 


Deep Creek 


600 






„ 21 


Moke Creek 


24 00 






Mar. 4 


Maconachie's Creek 


450 






,. 4 


McGiU's Creek . . 


4-25 


About minimum sununer 


flow. 


„ 9 


Lake Hayes outlet 


3-40 


»» ?• 




., 9 


Boundary Creek 


6-25 


99 ', 




„ 13 


Walter Creek . . 


300 


», ♦, 




„ 13 


McKinlay's Creek 


1530 


,, » 




„ 18 Lucas Creek 


4-75 


»t >» 




„ 18 Aftou Burn 


5500 


» >> 




„ 18 


Von River 


24000 


>, >» 




„ 19 


Seven-mile Creek 


125 


»J »J 




„ 19 


Five-mile Creek . . . . 


415 


5» >» 




„ 19 Eight-mile Creek 


Dry. 






.,26 „ .... 


400 


After rain. 




„ 19 


Ben Lomond Creek . . . . | 


425 


,, 




„ 19 


Lake Dispute outlet 


215 


Summer flow. 




„ 19 Lake Moke outlet 


3-75 


», 




„ 19 Right-hand Branch of Moke Creek 


1100 


99 




„ 19 Bob's Knob Creek 


2 00 


», 




„ 19 Picnic Bay Creek 


0-25 


99 




„ 19 Echo Creek 


215 


99 




„ 24 Lake Luna outlet . . 


4-25 


99 




» 24 


Ben More Creek, at town end of Lake 
Luna 


215 


99 




„ 24 


Lake Luna, First Hut Creek 


1-75 


99 




„ 24 Lake Luna, Second Hut Creek 


1-20 


99 




„ 24 Duke's Tarn outlet (near Lake Luna) 


0-60 


99 




„ 25 ; Twelve-inile Creek 


9 00 


99 




,. 25 


Twenty-four-mile Creek . . . . 


2-75 


" 















4— Queeostown. 



50 



CHAPTER V. 



BATHYMETRICAL SURVEY OF LAKES. 



Page 
General Procedure . . . . . . 50 i Moke Lake . . . . . . . . ol 



Page 




50 


Moke Lake . . 


50 


Lake Kilpatriuk 


50 


Lake Wakatipu 



Lake Hayes . . . . . . . . 50 Lake Kilpa trick . . . . . . 51 

Lake Johnson . . . . 50 Lake Wakatipu . . . . 51 

General Procedure. 

During the progress of the geological survey work, bathymetrical surveys were made of Lake 
Hayes, Lake Johnson, and Moke Lake. A survey and some soimdings were also made of 
Lake Kilpatrick. a tarn not far from Moke Lake. From the data thus obtained the contour- 
plans and sections illustrating this chapter were constructed. 

The lines of section along which the soundings were taken were fixed by line-traverses 
tied on to known points. 

The soundings were made with a weighted steel tape graduated in links, and the sounding 
intervals determined by pulling so many strokes in a given time, the direction being main- 
tained by ranging-fiags fixed in the line of section. 

Lake Hayes. 

This is shaped something like a rough parallelogram. It has a mean length of about 
two miles, a mean width of some 45 chains, and an area comprising 655 acres. Its surface 
lies 1,080 ft. above the sea, or 65 ft. above Lake Wakatipu. 

The 40 ft. contour follows the present shore-line very closely, and encloses 68 per cent, 
of the area of the lake. 

The maximum depth obtained was 108 ft. The 100 ft. contour begins 66 chains from the 
south or outlet end, whence it extends north-east for 63 chains, ending 25 chains from the 
upper end. The mean width of the 100 ft. floor is 15 chains. Thus we find that an area 

63 X 15 

- - — = 94-5 acres, or about one-seventh of the total area, lies at or below the 100 ft. level, 

and is almost flat. 

The gradient of the floor at the outlet end is 1 in 43-56, and at the upper end is 1 in 16*5. 
Except at the lower end, the descent to the 50 ft. contour is everywhere comparatively steep, 
being commonly about 1 in 7 

Lake Johnson. 

This small lake lies embayed between the north end of Queenstown Hill and Ferry Hill, 
and is about a mile and a half north of the upper end of Franlvton Arm. Its form, like that 
of Lake Hayes, is that of a rough parallelogram, running nearly north and south. 

This lakelet lies at a height of 1,285 ft. above the sea, or 270 ft. above Lake Wakatipu. 
It drains into the Shotover, from which it is distant half a mile. The area is 70 acres. 

The 40 ft. contour follows the present outline of the lake almost exactly, and encloses 
71 per cent, of its area. 

The deepest sounding obtained was 88 ft. The 80 ft. contoiir begins 9 chains from the 
south end, whence it extends northward for 32 chains, to a point 4*5 chains from the north 



61 

or outlet end. The mean width of the 80 ft. floor is 6-25 chains, thus giving an area of 
20 acres, or nearly 30 per cent, of the total area at that level. 

The gradient at the south end is 1 in 7-4, and at the north end 1 in 3-7. The descent to 
the 80 ft. contour is steep everywhere, except at the south end. 

The flow of the glacier that excavated this small rock-basin and Lake Hayes was from 
south to north, and it should be mentioned that in both cases the gentle slope down to the 
lake-floor is at the south end, and the steep slope at the north end. 

Moke Lake. 

This lake resembles two rough parallelograms joined at one end, forming a figure 
resembling a horse-shoe. It was excavated by two separate valley -glaciers that united at 
the outlet or northern end, forming a twin lake, a not uncommon feature in glaciated 
comitries. 

The surface of the lake lies 1,710 ft. above the sea, or 695 ft. above Lake Wakatipu. The 
length of each arm is about three-quarters of a mile, and the width of each about 20 chains. 
The total area is 240 acres. 

The greatest depth obtained was 145 ft., in the west ann, near Wedge Point. 

The area of the floor beneath the 140 ft. contour is 8 chains by 4 chains, and it lies 
immediately west of the end of Wedge Point. 

The greatest depth obtained in the east arm was 84 ft. A considerable extent of this 
arm lies above the 40 ft. contour, much of it having been filled in by detritus shot into the 
lake by the small streams draining the western slopes of Ben Lomond. 

In the western arm the gradient at the south end is 1 in 23 5, and at the north end 
I in 5-5. In the eastern ami the corresponding gradients are 1 in 33 and 1 in 5. Thus, as in 
Lake Hayes and Lake Johnson, we find the long slope in each arm at the end where the glacier 
entered the basin. 

L.\KE KlLl'ATRICK. 

This is a small tarn situated a mile or two from Moke Lake, in the glacier- valley leading 
to Lake Wakatipu. It lies at a height of 1,790 ft. above the sea, or 775 ft. above Lake Waka- 
tipu. It covers an area of 105 acres, and is quite shallow, the greatest depth being 12-5 ft. 

Lake Wakatipu. 

The bathymetrical survey of this lake was successfully carried out by Mr. Keith Lucas 
in 1902, and the results were embodied in a paper contributed to the Geographical Journal in 
1904. 

The first reference to the depth of Lake Wakatipu was made in 1864 by Mr. James 
McKerrow, sometime Surveyor-General of New Zealand, in a paper on the " Reconnaissance 
Survey of the Lake Districts of Otago and Southland."* 

In this paper McKerrow refers to some soundings that had been made near Queenstown, 
where a depth of 200 fathoms was found. Sir James Hector, in the same year, in a map 
deposited in the Otago Museum, showed the po.sitions of six soundings in Lake W^akatipu. In 
his paper on " Mining in New Zealand," published in 1869, Hectorf states that the soundings 
varied from 1,170 ft. to 1,296 ft., and from these data concluded that the bottom of the lake 
was " nearly level from side to side, and from end to end." 

In 1870, Mr. McKerrow, J in a paper on the " Physical Geography of the Lake Districts 



* Jour. Roy. GeoL Soc, vol. xxxiv, p. 56. 
t Trans. N.Z. In.st., vol. ii, 1869, p. 3()I. 
J Trans. N.Z. Inst., vol. iii, 1870, ]>. 254. 

4* — QuecnstowD. 



52 



of Otago," discusses the soundings taken by Hector, and refers to others taken Vjy several 
persons independently. Of these last, the greatest depth is stated to have been 1,400 ft., 
found " about the middle of the lake, off Collins Bay, and sixteen niiles from the south end 
of the lake. 

-The work done by Lucas occupied from the 1st October to the 7th November, 1902. 
Altogether 194 soundings were taken. Discussing the results of the soundings, he writes as 
follows :— 

" The basin of Lake Wakatipu agrees with other features of the lake in showing a remark- 
able regularity. From the north end, or head of the lake, the bottom shows an unbroken 
fall, rapid at first, but constantly decreasing, for a distance of thirty-two miles. In the next 
nine miles beyond there is a level floor, forming the lowest depression in the basin : thirteen 
soundings were taken within this basin, and the extreme variation was 6 ft. The greatest 
depth found was 1,242 ft. From the southern end of the level depression the upward slope 
of the floor commences, and a fairly imiform rise over a distance of eight miles leads up to 
the shore at Kingston, the southern end of the lake. 

" The maximum depth of 1,242 ft., which was obtained in 1902, does not agree with 
those which have been previously obtained. As has been stated above, in the accoimt of 
pre\'ious soundings taken in the lake, depths of 1,296 ft. and 1,400 ft. are recorded The latter 
depth, in particular, is said to have been found about the middle of the lake, ofE CoUins Bay, 
and sixteen miles from the south end of the lake. At the time when soundings were being 
made in 1902 the general belief among the inhabitants of Queenstown was that the deepest 
water was to be found ofi Collins Bay, and for this reason a Une of soundings was taken at 
that point, one sounding being placed midway across the lake, at a distance of between fifteen 
and sixteen miles from the south end of the lake ; but no evidence was found of water of a 
greater depth there than elsewhere. 

" Contour-lines have been dra\vn in the plan which accompanies this paper, at intervals 
of 200 ft. of depth within the lake-basin. An examination of these contours will serve to 
illustrate the gradients of the lake-floor from end to end, and for this purpose the distance 
between successive contours, from the head of the lake to the south end, are given below in 
tabular form : — 

Miles. 



" Shore to 200 ft. 


contour 






. . 3 


200 ft. contour to 400 








. . 0-5 


400 „ 600 








.. 2-7 


600 „ 800 








.. 5-3 


800 „ 1,000 








. . 6-3 


1,000 „ 1,200 








.. 9-7 


1.200 „ 1,200 








. . 17-4 


1.200 „ 1,000 








.. 1-3 


1,000 „ 800 








. . 10 


800 „ 600 








. . 1-7 


600 „ 400 








.. 1-3 


400 „ 200 








.. 10 


200 „ shore 








. . 0-5 



Here we have, in as marked a degree as in the case of Moke Lake and Lakes Johnson 
and Hayes, a long, gentle slope at the upper end of the basin, and a rapid slope at the lower 
end. It must be something more than a mere coincidence that all the glacial lake-basins in 
the Wakatipu area of which we have soundings have a gentle slope at the end at which the 
glacier entered, and a rapid slope at the other end. 

The bathymetrical survey of the lakes of Scotland shows that Loch Ness and other lakes 
possess the same feature. It would be interesting to know whether we are dealing with a 
principle common to all glacial lake-basins. 



To acco7?yoa.rvy 3tjJZetiro 2/9 7 



Ones of Cross Secf/ons< ~~, 



Q Slope Hill 

203/' 





JAMES MACKJNTOSH tCLL 
OIRCCTOR 



CHAINS 10 



CONTOUR PLAN OF 

— LAKE HAYES — 

— SHQTOVER S.D .— 

Contour Interval - 10 Feet 
— SCALE — 



=L 



50 

:3= 



100 CHAINS 
I 1 



BathyrrhetrtcaJ, Su.r'vey by EF Roberts 



Qetj. 



ty >)ut*«rity . John Haolray. Oovtrfimwit frinttr. 



IZSO lO/Oa BZl 



To accorr7pa.ny BzxZletijv If? 7 



W 



w 



w 



W V 



w \^ 



U4- below normal 
(^\le„tl of like 



Rim rock - Mica schist 



yv 



W V 




10 




w 



w 



w 



w 



12 




^ £ 



W ^ 



14 



15 



_y E 



— CROSS SECTIONS OF — 
— LAKE HAYES 




LONGITUDINAL SECTION OF LAKE HAYES 



SHOTOVER S. D. 



JAMC* MACKINTOSH BCU 
DiniCTOf* 



SCALES — 



HORIZONTAL VERTICAL 

CHAINS 10 10 20 30 40 50 CHAINS FEET ICX) 100 ?00 JOO 40O 500 fEtT 

I'"" ! I -I I"" 1 ] f I -I 



BoLthymetrzcaL Survey ty E.FBDber-Cs 



N 



qEf/. 



9$ Authority 1 John MaoAay, Govrnmvtt Printer. 



/2S0. 10/06-887 



To accornpany BulZettrv IT" 7. 



CROSS SECTIONS 




N 



LONGITUDINAL SECTION 



HORIZONTAL 

CHAINS lO 5 O 10 

P I I I I I I I I I 1 



SCALES — 

VERTICAL 

20 CHS f'lOO o ^*00~ 

■^^ II 'Ill I I ' ■• — 



800 FEET 

11 11 





JAMIS MACKINTOSH SELL 
OIRCCTON 



— CONTOUR PLAN 

— AND — 

— SECTIONS — 

- OF - 

LAKE JOHNSON 

- SHOTOVER S. D - 



— CONTOUR PLAN 



BoXJzymeirtcaZ Survey hy HHamiltorv 



qa^. 



ty 4wf/)ority J%hm Ifackan. Oovtmm^nt Frintt' 



tsso.fz oa.aes. 



To accarrtpCLTvy SuHetxro _?/"? 7 





10 




HORIZONTAL 



-t-n-n-r 



CROSS SECTIONS 

— SCALES — 



VERTICAL 



20 tUS t ' 100 



800 ff tT 

=1 




I 



/ T Thts part of The 
^ \ofd Lakebssin « 

( fan formed by 
[ B mountain 
' Stream 



— CONTOUR PLAN 



SCALE — 




JAMES MACKINTOSH BCLL 
OinCCTOR 



— CONTOUR PLAN - 

— AND 

CROSS SECTIONS 



— OF — 

MOKE LAKE 



MID-WAKATIPU S.D. 



CHAINS 10 O 
' ■ ■ 



lO 20 30 40 



IBa.Ch.y-rn.t^iriccLi Survey by If ffajriiZtorv 



^f V. 



Bif Authority ^ohn ttackay. Qcvmrntnt Printmr. 



ts£o jeoe szs 



55 

Lucas, when discussing the shape of the Wakatipu basiii, says,— 

" Transverse sections, taken at almost any part of the lake, resemble one another to a 
remarkable degree. They show steep slopes leading down from opposite shores to a wide level 
floor, of a width equal to, or greater than, half the width of the lake at surface-level. This 
characteristic trough-like formation is most marked where the depth is considerable. Within 
the 800 ft., the 1,000 ft., and the 1,200 ft. contours, for example, the level floor at some points 
occupies as much as 50 per cent., 60 per cent., and 70 per cent, of the surface-width. And 
even in shallower water a similar formation is evident, though to a less extreme degree. 

" There is but little special description needed to modify the general scheme of the lake- 
basin which has already been laid down, for the regularity of the basin is disturbed in but 
few places. The two larger islands. Pigeon Island and Pig Island, which Ue in the north 
arm, are connected by a shallow bank, while the smaller, Tree Island, which lies to the west 
of them, is separated from them by water of greater depth, probably exceeding 200 ft. The 
whole group lies within a projecting arm of the 400 ft. contour, which runs in a southward 
direction from the eastern shore. The channel between the eastern shore and the islands 
exceeds 400 ft. in depth, except in its most northern part, while between the islands and 
the western shore there is a continuous channel over 600 ft. in depth. 

" The Frankton Arm barely passes a depth of 100 ft. at any point, and is separated from 
the main body of the lake by a barrier, over which there is little more than 60 ft. of water. 
Queenstown Bay is also shallow, and its mouth is also crossed by a barrier. The other more 
open bays which the lake contains showed, as far as special soundings were made in them, 
a regular deflection of the contours, which calls for no special mention. 

" The volume of water in Lake Wakatipu, as calculated from the areas included between 
successive isobathic contours, is 15 cubic miles, and the mean depth is 707 ft." 

The areas of the lakes of which soundings were made under the supervision of the author 
of this bulletin, and the number of soundings taken in each, are given below : — 



Nanu- of Liike. 


... Number 

Area, in .\crps. , ^, , 

of .SoundiiigK. 


Number of Soundings. 


Per Acre. 


Per Square Mile. 


Hayes . . 
Johnson 
Moke 
Kilpatrick 


655 

70 

210 

105 


72 

22 

40 

6 


91 
3-2 
60 
1-7 


70-4 
2011 
106-6 
365 -7 



54 



CHAPTER VI. 



GENERAL GEOLOGY: 



Table of Formations . . 
Maniototo Series 

Distribution 

Rocks 

Disposition and Thickness of Strata . 

Petrology of the Schists 

Foliation of the Schists 

Origin of the Schists 

Metamorphism of the Schists 

Relationship to Underlying Formation 

Age of the Schists . . 

Eruptive Rocks 

Economic Minerals . . 
Kakanui Seiies 

Distribution 

Rocks 

Relationship to Underlying Formation 

Relationship to Overlying Formations 

Age of Kakanui Series 

Eruptive Rocks 

Economic Minerals . . 



Page 






Page 


64 


Lower Miocene : Oamaru Series 




60 


54 


Involvement in Schists 




61 


54 


Depth of Involvement of Tertia 


ries 


63 


55 


Warjnng of Tertiaries at Bob's 


Cove . . 


65 


56 


Thickness of Tertiary Beds . . 




66 


57 


Fossil Contents 




66 


58 


Age of Marine Series 




67 


58 


Economic Value 




67 


58 


Pleistocene . . 




67 


59 


Calcareous Ooze at Lake Hayes 




68 


59 


Character of EiTatics 




6!) 


59 


Petrology of Crystalline and 


Igneous 




59 


Rocks in Fluvio-glacial Drifts 


69 


59 


Hornblende-lamprophyres . . 




69 


59 


Saxonite (Hartzbergite) 




70 


59 


Norites . . 




71 


60 


Hornblende-diorites 




72 


60 


Hornblende-syenites 




72 


60 


Granites. . 




73 


60 


Recent 




73 


60 









Table of Formations. 

The geological formations represented in the district are shown below in tabulated form in the; 
order of their age and superposition : — « 

Recent, — 

River-beds, alluvial flats, swamps, &c. 
Pleistocene, — 

a. Terrace-gravels, old fans, and modified glacier-drifts. 

b. Boulder-clays and moraines. 
Lower Miocene, — 

Oamaru Series — 

a. Sandstones and conglomerates. 

b. Limestone. 

c. Marly sandstone. 

d. Marly clays and marls. 

e. Calcareous breccias and conglomerate. 
Palaeozoic, — 

Kakanui Series — 

a. Mica-schist, altered greywacke, and mudstone 
Maniototo Series — 

a. Mica-schist, with bands of chlorite-schist. 
Igneous, — Absent. 



Maniototo Series. 

Distribution. — This formation occupies the whole of Soho, Skipper's Creek, and Shotover 
survey districts, and the eastern portion of the Mid-Wakatipu district. It has now been 
traced continuously from the Puketoi Range, on the west side of the Maniototo basin, north- 



55 

westward to Mount Aurum and the sources of the Shotover River, a distance of over eighty 
miles. The continuation of the northerly course will carry it into the upper part of the Rees 
Valley, and thence across the back of Mount Earnslaw to the sources of the Dart and Aaawata 
rivers. 

Rocks. — The Maniototo Series is composed mainly of mica-schist, which occurs in endless 
variety. Thus we have a soft flaky or flaggy silvery-grey mica-schist, prominently repre- 
sented in the Skipper's, Lower Shotover, Arrow, and Macetown districts. It is for the most 
part composed of thin paper-like lamina; of micaceous matter and quartz, and is a weak rock, 
being friable, crumbling, and easily bent, as witness the manner in which it has been crushed, 
bent, and distorted by the pressure of glacier-ice on the slopes of Coronet Range on the road 
leading up to Skipper's Saddle ; or bent and turned over by the pressure of its own mass, 
as in the gorge of the Arrow River on the road to Macetown, where we have, soon after leaving 
Arrowtown, some beautiful examples of outcrop-curvature. 

In some places the quartz lamina' predominate — that is, they occur in thicker laminiu 
than the micaceous matter, and, i)eing less continuous than the latter, sometimes impart 
a gneissoid appearance to the weathered outcrops. They commonly vary from \ in. to \ in. 
thick, but lamiucB over ^ in. thick are not uncommon. The quartz occurs in short irregular 
sheets or flat lenses, that run in and out in a confused manner. This quartzose mica-schist 
is a strong rock, and splits readily into both thick and thin Hags. 

In a few places the micaceous matter is entirely replaced by (juartz, forming a quartz- 
schist that is generally more or less micaceous. This is an intensely hard rock. It is not 
uncommon in the lower horizons of the Maniototian, but seldom occurs in bands more than a 
few feet or a few yards thick. It is in these bands of quartz-schist that we find the beautiful 
pink or ffesh-coloured micaceous quartz-schist that has been described by the author among 
the gravels of the Arrow, Kawarau, and C'lutha rivers in Bulletins Nos. 2 and 5. 

The impression conveyed to the mind by the examination of the mica-schists in this 
and adjoining districts is tliat they are rocks that have suffered an intense degree of meta- 
morphism. 

From the Maniototo basin to the western slopes of the Dunstan Range, fringing the 
Cromwell basin, the strong quartzose variety of mica-schist predominates ; but on Pisa Range, 
and going westward towards the Crown Range, the softer grey silky variety becomes more 
and more in evidence, until, when we reach the upper end of the Kawarau Gorge, it is the 
predominating rock. From this transition we gather that the original sediments were mainly 
arenaceous in the south, and mainly argillaceous in the north, the former marking shore- 
line, the latter deep-water conditions of deposition. 

Intercalated in the mica-schist there are several bands of chlorite-schist, or of mica- 
schist coloured a pale green with chloritic matter. These chloritic bands occur in all parts 
of the Maniototian, but are most common in the lower portion. 

At the western botmdary of the Kawarau district, where it adjoins the Shotover district, 
there was noted by the author in the summer of 1906-7 an apparent thickening not only of the 
mica-schist, but also of the intercalated bands of chlorite-schist.* The detailed examination 
of that area during the past summer affords conclusive proof of a very remarkable thickening 
of the chlorite-schist, to which further reference will be found below. 

In their upper part the mica-schists become less and less altered, and pass insensibly 
into altered greywacke, often laminated and veined with quartz, and flaggy micaceous clay- 
stones also seamed with quartz. 

The lower half of the Maniototo Series in the Kawarau district is intercalated 
with six bands of chloritic mica-schist, varying from a few feet to a few yards wide. 



• James Park. " The Geology of Cromwell Subdivision," Bulletin No. 5 (New Series), N.Z. G.S., 1908, p. 3. 



56 

111 a few places the chloiitic matter predominates, the rock in these cases passing into 
a chlorite-schist. 

On the western slopes of the Crown Range, fronting the Arrow, the lower bands begin to 
increase in thickness in passing northward, the increase being so rapid that when the Arrow 
River is reached the total thickness of chlorite-schist is somewhat over 1,600 ft. The chloritic- 
schist outcrop extends from a point a few chains north of Bracken's Creek to a point some 
15 chains from the Soho jmiction, and, as the river and the road pass over the outcrop almost 
at right angles to the strike, a very clear sectional view is obtained 

The chlorite-schist does not occur in a continuous band. In its upper part it is inter- 
bedded with four beds of mica-schist, with an aggregate thickness of about 370 ft. The 
actual thickness of the chlorite-schist, exclusive of the mica-schist bands, is about 1,200 ft. 

Following northward along the strike the chlorite-schist decreases in thickness in the 
most remarkable manner, so that in little better than a mile its thickness does not exceed 50 ft. 
In other words, the chlorite-schist occurs in the form of a lens about two miles long, which is, 
curiously enough, cut through by the Arrow River at its widest part. 

Proceeding up the Soho, whose course is a continuation of the Arrow Gorge, the chlorite- 
schist is met with a few chains from the Arrow junction, and is beautifully exposed in cross- 
section on the banks of the Soho for a distance of nearly half a mile. 

The chlorite-schist exposed in the Soho has an aggregate thickness of some 1,200 ft., 
and occurs in the form of a rapidly tapering lens. There can be little doubt that the Soho band 
of chlorite-schist is a repetition of the Arrow band. 

With the chlorite-schist there sometimes occurs a thin streak or band of a dark-grey 
•actinolite-schist, which passes into a quartz-schist, in which sheaves of pale-green actinolite 
are fully developed. 

Disposition and Thickness of Strata. — The mica-schist, as seen in sectional view, is every- 
where in this area free from apparent tectonic folding, but, on the other hand, is traversed 
by a series of powerful faults and thrust-planes, so that, while the continuous dip from 
Macetown to Lake Wakatipu would seem to indicate great simplicity of structure, the 
closer examination shows that the dislocations have introduced complications that the 
casual examination does not disclose. 

The general strike is between north-north-east and north, and the dip regularly to the 
westward from Macetowii to Lake Wakatipu. 

The Arrow fault runs nearly parallel with the strike of the schists. Its vertical displace- 
ment must have been considerable, as it has caused a repetition of the great lens of chlorite- 
schist that occurs near the junction of the Arrow and Soho. 

The Shotover fault follows a nearly north-and-south course ; and, judging from the 
great thickness of crushed rock along its walls, the movement and pressure of which it is the 
resultant must have been very great. In the absence of a distinctive stratum or bed of schist 
displaced by it, there is no standard of measure by which the amount of movement or dis- 
placement can be determined. There can be no doubt, however, that such a powerful fault 
must have caused a considerable vertical displacement of the schists which it traversed. 

The great Moonlight thrust-plane, along which the Miocene Tertiaries are involved, runs 
parallel with the Shotover fault, and almost parallel with the strike of the schist. Its dip 
seems to coincide with that of the schist. 

The mechanics of the movement that entangled the long thin wedge of marine sandston"- 
and conglomerate along this dislocation is not quite easy to explain. That it followed the move- 
ment of simple faulting is altogether improbable. Hence we must fall back on the hypothesis 
that the great fold' whose axis was nearly parallel to the Miocene shore-Une, on which the 
conglomerate was formed, was pushed over from the westward, overwhelming and entangling 
in its embrace, as it became bent over, a wide slice of the Tertiary rock. 



61 

The extraordinary manner in which the Tertiary strata at Bob's Cove are twisted and 
warped affords ample evidence of earth-movements on a profound scale after the close of the 
Miocene and some time before the advent of the glacial period. 

When a succession of overthrust-folds close on each other, a continuance of the disturbiiig 
tangential stress must result in shearing, the tendency of the movement being to push one 
fold over the other. Such shearing, which is only a form of faulting, will be more liable to 
take place along the troughs of the folds in the line of compression than along the arches 
of the anticlinals, which will be in tension. 

The Moonlight wedge of Tertiaries runs parallel to a plane of dislocation, along which 
a considerable amount of displacement has taken place, as the great width of crushed and 
shattered mica-schist on the foot-wall of the Miocene wedge on Mount Gilbert and elsewhere 
bears ample witness. 

The Shotover fault or Pug lode, the Arrow fault, and the Moonlight shear-plane, what- 
ever the mechanics of their movement, make it clear enough that the increase in thickness 
of the schists, which the continuous westerly dip might seem to imply, is apparent, and not 
real. The repetition of the great band of chlorite-schist at the junction of the Arrow and 
Soho is sufficient proof of this alone. 

The presence of the faults, the shearing and overfolding, make it almost impossible to 
compute the true thickricss of the Maniototian schists. In the beautiful section exposed 
along the gorge of the Arrow River, from Arrowtown to the Soho junction, we have a con- 
tinuous westerly dip for a distance of three miles and a half, at angles varying from 40° to 
60°, with a mean angle not less than 50^. Here we have an apparent thickness of soniewhat 
over 14,000 ft. 

The Stony Creek section, from the Shotover Pug lode or fault to the wedge of Miocene 
Tertiaries under Mount Gilbert, exposes a very clear view of the mica-schist at right angles 
to the strike in a distance of three miles and a half. The dip is westward, at angles varying 
from 45° to 70°. The mean angle of dip for the whole distance is probably not much under 
55°, which would give an apparent thickness of a Httle over 15,000 ft. 

The greatest thickness of the Maniototo Series exposed in the Alexandra district is about 
10,000 ft., and in the Cromwell area about 12,000 ft.* The greatest thickness in the Arrow 
and Shotover districts cannot be safely put at over 14,000 ft. or 15,0{X) ft. 

The abnormal increase in thickness of the chlorite-schist near the Arrow and Soho junction 
is quite local. In a previous report it was suggested that the chlorite-schist was an altered 
contemporary basic volcanic. f The discovery of this huge lens would tend to strengthen 
that view, for it is only possible to account for it by assuming that it marks the site of a 
Palaeozoic volcano, the outbursts of which were contemporary with the formation of the 
schists. The beds of mica-schist intercalated in the chlorite-schist would indicate that the 
eruptions, or, at any rate, the lat«r ones, were of an intermittent character. 

Petrology of the Schists. — The bulk of the mica-schist is a soft, silky, grey rock, consisting 
of thin alternating laminae of quartz and micaceous matter. The laminae are not regular 
or continuous, and are often wavy or finely corrugated. In many places the quartz laminae 
vary from | in. to J in. thick, and are in such cases conspicuous. In other places, but only 
in subordinate bands, the quartz almost entirely replaces the micaceous matter, the rock 
then passing into what might be termed a micaceous quartz-schist. This quartz-schist is 
commonly grey in colour, but in a few places it contains streaks and even bands of pink quartz 
from an inch to two or three feet thick. These bands of pink quartz-schist are never con- 
tmuous for any great distance. The pink colour is due to the presence of minute pink-coloured 
crystals of quartz that are coloured with iron-peroxide. 

* James Park. " Geology of Cromwell Subdivision, "Bulletin No. 5 (New Series), N.Z. G.8., 1908, p. 25. 
f Loc. cil., p. 25. 



58 • 

In some j^laces the quartz lauiinsc are absent or poorly represented, the rock in these 
cases having the appearance of a phyllite. 

Tlie mica-schist in which the laminai are thin is the predominating rock in the Arrow 
and iShotover districts. It is a weak' rock, and in the places where it has been subjected to 
great lateral pressure, which is generally in the vicinity of faults, it isCminutely but regularly 
corrugated, and in these places presents a somewhat remarkable appearance, from the cir- 
cumstance that the corrugations are not only miiform in width and parallel, but sharply 
angular instead of being rounded in the , folds and troughs, as is commonly the case. The 
distance from the centre of the trough to the centre of the apex of a fold is generally three 
or four inches. The general effect of this peculiar angular corrugation when seen in cross- 
section is that of twilled cloth, suggesting to the mind the herring-bone stitch of needlewomen. 
It is well shown in Plate XXVI. 

AMien examined under the microscope in thin section, the mica-schist is found to consist 
almost exclusively of quartz and a white sericitic mica arranged in irregular wavy laminae. 
Riitile is always present, in thin sharply defined needles that are often nearly opaque. A few 
2)lates of an acid plagioclase-feldspar are present in each slide, and occasionally a httle chlorite 
in pale-green scales and fibres. 

The chlorite-schist is commonly a pale to dark green' rock, often possessing a silky lustre. 
It is soft when imaltered, and fibrous. Magnetite is often present in large and small grains. 
The rock is often laminated and veined with quartz, and in many places contains irregular 
patches and bands that have been epidotized. 

"WTien viewed in thin slice the chlorite-schist is seen to consist of chlorite^ and quartz, 
with magnetite, rutile, and feldspar as primary accessory constituents, calcite and epidote 
as alteration-products. The chlorite occurs in scales that are often altered at the margins, 
while some are stained a reddish-brown with haematite. It may, perhaps, be an alteration- 
product oi hornblende. Plagioclase is always' present, and often in some abxmdance, gene- 
rally occurring in large plates. The quartz occurs in flattened grains, arranged parallel with 
the foliation. Rutile is generally present, but is never abundant. 

A fairly common rock in the gold- wash is a heavy, dense, dull, reddish-coloured rock 
thickly impregnated with magnetite. On examination with the microscope it is found to 
be a garnet rock. 

Foliation of the Schists. — The planes of foliation coincide with the changes of lithological 
character of the rock-material, from which it is inferred that they coincide with the bedding- 
plane of the original sediments from which the schists were formed. 

Origin of the Schists. — The field and laboratory examination proves that the mica-schist 
is composed of clastic materials that were originally arenaceous and argillaceous sediments, 
probably thin-bedded greywacke and mudstone. From the apparent greater thickness of the 
schists in the western part of Central Otago it was assumed last year that the shore-line of the 
Palaeozoic sea, on which the sediments accumulated, lay to the westward. The apparent in- 
crease of thickness has been foimd to be due in great part to overthrust-folding, and not to 
the proximity of the ancient shore-line. 

The past year's field-work proves that not only is there no real increase in thickness of 
the strata, but that the rocks become more and more argillaceous in proceeding westward, 
from which it may be contended that the shore-line of the Palaeozoic sea lay somewhere to 
the eastward. 

The composition, mineralogical character, and mode of occurrence of the chlorite-schist 
seem to show fairly conclusively that it originated from altered basic volcanic material of 
contemporary date. 

Metamorphism of the Schists. — The Maniototian schists cover an area of some five thousand 
square miles ; and their ascertained thickness is over two miles and a half of strata. Through- 



rr.ATE XXVI. 




SllAHl'l.Y CliUMI'l.Kl) M ICA-rtCHIST. 



I'liiito ./mil IS I'drh. 




Hkruimj-bom; Ckcmj'i.ed MitA-scHifiT, Skipper's Ckkek. 



Photo James Park.] 



liuUftin Xo. y.] 



[To fore. p. ,',S. 



I'LATK XXVII. 




SKMI-METAMOUrHIC MlCA-SCHIST OF THE KaKANUIAN, WITH QUAHTZ- I.AM LN.K, 0.\ llOAli I'HOM 

QUEKNSTOWN TO FiVE-MII.E CliEEK. 

I'hutu .Ifjiiiix ]'urk.\ 



• 59 

out this wide area and thickness they are highly metamorphosed, and a striking feature of this 
profound metamorphism is its marvellous uniformity. Perhaps uo less remarkable than the 
alteration and foliation of the sediments of this great formation is the almost complete absence 
of intrusive sills and dykes throughout its length and breadth. 

The metamorphism is not contact or thermal. It is regional, and must be ascribed to 
dynamical agencies. The arguments in favour of this view have been fully discussed in 
Bulletin No. 5,* and need not be repeated. 

Relationship to Underlying Formation. — The basement rocks of the Maniototian are 
nowhere exposed, and therefore no junction between them and the formation on which they 
rest can be examined. The character of the underlying formation is still unknown, and is not 
likely to be disclosed xmtil the survey is carried over to the moxmtains of the main divide. 

Age of the Schists. — The Maniototian schists contain no internal evidence bearing on their 
age. The age and character of the rocks on which they rest are still unknown, so that we 
have no means of limiting their age going downwards. On the other hand, we know that on the 
west side of Lake Wakatipu they pass upward into the semi-metamorphosed Kakanuian 
and Te Auaus, consisting of altered greywacke, argillite, phyllite, and conglomerates that 
are associated with serpentijies and other basic igneous rocks. 

Between Athol and Lumsden the schists are overlain by argillites that pass upward into 
fossiliferous claystones containing Monotis and other Triassic forms. The absence of the 
typical greywacke series in this area seems to show that an unconformity exists between 
the Triassic claystones and the underlying Kakanuian schists. At present it does not seem 
desirable to ascribe the Maniototian to any particular period. That they are Cambrian or 
earlier is almost certain, as at Collingwood they are overlain by rocks containing Ordovioian 
graptolites. 

Eruptive Rocks. — No eruptive rocks of any kind appear on the surface in the area under 
examination, but pebbles of hornblende-lamprophyre are fairly conunon in the gravels of 
the Shotover. Dykes of a black igneous rock are reported to occur among the mountains 
lying between the sources of the Shotover and the Matukituki Valley. They are probably 
the source of the pebbles and boulders of igneous rock spoken of above. 

Economic Minerals. — This formation contains the gold-bearing veins at Macetown, Shot- 
over, and Skipper' .s, and is economically the most important in Otago. Besides gold, it 
contains scheelite, copper, and antimony, the first of which is of great value. Tiie minerals 
of economic value are fully discussed in the chapter dealing with " Economic Geology." 

Kakanui Skribs. 

Distribution. — The rocks of this series appear on the north shore of the middle arm of i^ake 
Wakatipu, about two miles and a half from Quecnstown, at a point a short distance past Picnic 
Bay. From there they form the ridges fringing the lake to the northern boundary of the 
district examined — that is, to the Twenty-five-mile Creek. All the rocks on the west side 
of the lake within the boundaries of the Mid-Wakatipu district belong to this series. 

Rocks. — They generally consist of semi-metamorphic argillites and greywacke, in places 
passing into mica-schist, with occasional bands of phyllite and flaggy schist. The argillites 
and greywacke are often laminated with quartz seams that commonly run more or less parallel 
to the bedding-planes of the rock, and seamed with thin veins of white or grey quartz (see 
Plate XXVII). 

In the upper part of the series the rocks are slaty and flaggy, and much less quartzose 
than in the horizon lying next to the underlying Maniototian. At the upper end of Lake 



♦ James Park. Bulletin No. 5 (New Serie.s), N.Z. G.S., 1908, p. 25, " Dynamical Origin of Metamorphism." 



60 

Dispute they are sometimes gritty and brecciated, while on Walter and Cecil peaks they pass 
into greywacke that is not much altered. 

Relationship to Underlying Formation. — The rocks included in the Kakanui Series are 
merely the upper less-altered portion of the great metamorphic series of Central and Western 
Otago. They are perfectly conformable to the underlying Maniototian, from which they 
are not always easily separable. 

Relationship to Overlying Formations. — In the district under review the semi-metamorphic 
Kakanuian is not overlain by or in contact with a stratigraphically superior formation. 

At the mouth of the Greenstone River and at Rere Lake the rocks are slaty phyllites, 
often quartzose, and weathering a rusty-brown colour. Following up the Greenstone Valley, 
which for the first six miles rmis west and south-west, the rocks exposed, in the order of their 
sequence, by the continuous westerly dip, according to Professor S. Herbert Cox,* are as 
follows : — 

III. Indigo-blue slates. 

IV. Red and green breccias, with heavy beds of green aphanite slate. 
V. Dark-coloured jointed slates, with bands of black serpentine. 

Among the large masses of rock in the great moraine lying between Rere Lake and the 
mouth of Greenstone River are many examples of a coarse conglomerate, composed mainly 
of large and small boulders of diorite, no rite, granite, &c., and other crystalline rocks. This 
conglomerate has not yet been found in situ, but it probably belongs to the Takitimu Series, 
which is traversed by numerous dykes of diorite in the Eglinton country at the head of Lake 
Te Anau, or to the Wairoa Series, which at Hokanui Range and Nugget Point contains beds 
of a similar conglomerate. 

From Athol southward, the Kakanui Series is followed by bedded claystones and grey- 
wacke that are not in the least altered, and bear a strong resemblance to the rocks forming 
the base of the Wairoa Series throughout other parts of Southland. The absence of the red 
and green breccias with heavy beds of green aphanite slate, and the dark-coloured jointed 
slates with bands of serpentine as seen in the Greenstone Section points to the existence of 
an unconformity between the Kakanuian and the Triassic Wairoas. 

Age of Kakanui Series. — No fresh evidence has been adduced as to the probable age of 
this series, which is so intimately associated with the Maniototian that when the age of one 
is determined the age of both will be known. 

Eruptive Rocks. — No eruptive rocks were found in the Kakanui Series in any part of 
the district, and none have ever been reported from it in any part of Otago. On the other 
hand, the overlying Te Anau Series is commonly intercalated with gigantic sills of dunite, 
serpentine, or diabase, and intruded by dykes of diorite, norite, &c. 

Economic Minerals. — Veins of quartz and large well-defined quartz lodes are not un- 
common in this formation. Many of the lodes were sampled and assayed for gold, but at 
the places examined none of them were rich enough to be profitable, but there is reason to 
believe that systematic prospecting will discover ore-shoots of good grade in some of them. 
The quartz lodes sometimes contain scheelite in profitable quantity. 

Lower Miocene : Oamaru Series. 

a. Sandstones and conglomerates. 

b. Limestone. 

c. Marly sandstone. 

d. Marly clays and marls. 

e. Sandstones, breccias, and conglomerate passing into limestone. 



* S. H. Cox. N.Z. G.S. " Reports of Geological Explorations," 187»-79, p. 53. 



61 

With the exception of bed e, which extends as a narrow strip from Bob's Cove to the 
Upper Shotover, the Miocene Tertiaries are confined to the vicinity of Bob's Cove, often spoken 
of as the Twelve-mile. Bob's Cove lies on the north shore of the middle arm of Lake Waka- 
tipu, at a distance of some ten or eleven miles from Queenstown, and is reached either by 
a bridle-track following the shore of the lake, or by boat. 

This small isolated patch of marine Miocene beds forms a sharp ice-shorn ridge, running 
parallel with the trend of the lake. Although less than half a square mile in extent, it presents 
some geological features of peculiar interest, more particularly in connection with dynamical 
problems, and mountain-building. 

Involvement in Schists. 

The lowest bed of the series, marked e in the tabulated statement above, is detached from 
the main body of the series, being deeply involved, as seen on the shore of the lake, among 
the Kakanuian schists, which are broken, shattered, and brecciated for a great thickness in 
the vicinity of Bob's Cove. 

From Lake Wakatipu this strip of fossiliferous breccia-conglomerate extends in a northerly 
course to Moonlight Creek, thence across Mount Gilbert to Stony Creek, whence it proceeds 
in an almost direct course along the higher slopes of the Richardson Mountains to near the 
source of the Right Hand Branch of the Shotover, a total distance of twenty-five miles. It 
runs across hill and dale, rising in places to a height of nearly 6,000 ft. above the sea, in others 
descending to a little over 1,000 ft., but is not now continuous, having been removed by 
denudation in some of the deeper gorges. 

It is a geological feature of extraordinary interest, and, so far as known at present, there 
is nothing comparable to it except the narrow wedge-like strips of nummulitic limestone 
(Eocene) involved in the Malm (Wliite .Jura) on the west side of the .Jungfrau, in the Bernese 
Oberland, in Switzerland. It was first noted by Mr. Alexander McKay* in the year 1880, 
but its significance appears to have escaped the notice of Captain Hutton when discussing the 
mountain-building of the New Zealand Alps at a later date. 

The section exposed on the margin of the lake on the east side of Bob's Cove is shown 
in Fig. 12 below : — 




Fig 12. — Section near Bob's Cove, showing Wbdoe of Miocene Brbccia-conolomebate involved 

IN Schist, 65 ft. thick. 

a. Quartzose mica-schiat, strongly brecciated. 6. Micaceous schist, much shaken and broken. 

c. Miocene|^breocia-conglomerate. 



At this place the schist strikes north-and-south (true), and dips west at an angle 



of 53° 



♦ A. McKay. N.Z. Q.8. " Reports of Geological Explorations," 1879-80, p. 145. 



62 

For a distance of 15 chains towards Queenstowm — that is, going eastward in respect 
to the^above section — the schist is strongly brecciated in wide zones, having been crushed 
into small angular fragments resembling road-metal, and afterwards recemented into a hard 
rock by the deposition of silica in the interstices. 

The mica-schist on the west side of the Miocene wedge is soft, decomposed, and crumbling. 
It is overlain by the marly clays andFother members of the Tertiary Series in orderly suc- 
cession. 

The breccia-conglomerate involved in the schist consists of angular and rounded pieces 
of the underlying schist set in a cement of yellowish-coloured limestone that contains many 
broken shells, among which fragments of a large oyster are conspicuous. It is well exposed 
at the point where it crosses the Twelve-mile Creek, about two miles and a half distant from 
the lake, on the ridge lying near the head of Seller's Creek ; at the points where it crosses 
Dead Horse, Moonlight, and Stony creeks ; and on the slopes of the Richardson Mountains, 
between Stony Creek and the Left Hand Branch of Skipper's ; and also at many intermediate 
places. 

At the Moonlight crossing it is about 140 ft. thick, and consists of bands of breccia, 
sandstone, and limestone. 

At the Stony Creek crossing it varies from 8 ft. to 20 ft. thick, and consists of hard 
siliceous sandstone passing into gritstone and conglomerate. Its strike is 5° (true), and 
its dip westerly at an agle of 70°. The outcrop at the point where it crosses Stony 
Creek is 1,800 ft. above the sea. The section exposed on the north bank of the 
creek is shown in Fig. 13 below : — 




Fig. 13. Section at Stony Creek, showing Marine Tertiaries interbedded with the Paleozoic 

Schists. 

a. Mica-schist, soft, crumbling, silvery grey. b. The same schist as a, but twisted, shattered, and 

contorted. c. Chlorite-schist, partially epidotized and silicified — a hard and strong rock. 

d. Tertiary fossiliferous sandstone. e. Thin band of stiff blue clay — crushed schist. 

/. Quartzose breccia — conglomerate passing iato siliceous sandstone. 



The wall next the chlorite-schist is even and straight ; while that next the mica-schist, 
although well defined, is irregular or corrugated, and often strongly slickensided. 



63 

The section on the south side of the creek looking southward is shown in Fig. 14 ; — 




F"io. 14. SEf'TioN SHOwiNc MARINE Tebtiaries intekbedded with Paleozoic Schists at Stony 

Creek, near Foot of .Mount Gilbert. 

(I. ( 'lilorite-schist. b. Micti-Hi-hist, soft and iruslied. c. liand of stiff blue olaj', with gi'itty 

particles of quartz from 8 in. to IC in. thick. d. (!rey siliceous sandstone, fossiliferous, 

12 ft. thick. e. (Juartzose breccia, from 2 ft. to 3 ft. tliick. 



On the north side the Marine bed varies from 14 ft. to 20 ft. thick, and shows a tendency 
to increase in thickness going northward. 

The siliceous sandstone contains a considerable number of fossil-remains, among which 
were identified a Venus, Pinna, Ostrea (very large and thick, like 0. WuUerstorfi), Turritdla, 
Natica, a thin striated Dentalium like D. MantelU, some corals and fucoid stems. 

From Stony Creek the Marine bed runs northward along the eastern slopes of the Richard- 
son Mountains towards Mount Aurum, and southward across the shoulder of Mount Gilbert to 
Moonlight and Lake Wakatipu. 

Going nortliward from Stony -Creek it rises very rapidly, the steep angle of dip carrying 
it on to the summit of the Silverhorn, which it crosses at a height of 5,300 ft. some 20'chains 
east of the highest peak. This is the greatest elevation at which rocks of Tertiary age have 
been found in New Zealand. It is not unlikely that they will be found at even a greater 
altitude on the northern end of the Richardson Mountains beyond Mount Aurum. 

The fold in which the Tertiaries are entangled does not follow the strike of the schists, 
but passes obliquely across it, so that when the source of the Left Hand Branch of Skipper's 
Creek is reached the chlorite-schiat forms the foot-wall instead of the hanging-wall, as at 
Stony Creek. 

Depth of Involvement of Tertiaries. 

Stony Creek is a great natural crosscut running at right angles to the trend of the mica- 
schist and its contained band of fossiliferous Tertiary sandstone. The latter is cut through in 
the bed of the stream, at an altitude of 1,800 ft. above the sea, and can be traced continuouslv, 
as if it were a member of the schist-formation, from the bed of the stream northward to the 
summit of the Silverhorn, which it crosses at an altitude of 5,300 ft. 

Such profoimd involvement of a thin band of Miocene strata in a highly altered Paleozoic 
formation seems almost incredible, but the stratigraphical evidence could not be clearer, even 
if the Tertiary sandstone were a contemporary bed of coal interbedded in the schist. 



64 

But, obviously, 3,500 ft. does not measure the maximum depth of the infolding. The 
Silverhorn shows marks of extensive ice-erosion, and we are well justified in the belief that 
the outcrop of the Miocene rocks stood at one time many hundreds of feet higher than at 
present. 

In the bed of Stony Creek the infolded rock forms a hard well-defined band, that might 
very well descend a considerable depth below the 1,800 ft. level 

Going southward from Stony Creek the Tertiary band crosses the east shoulder of Mount 
Gilbert at a height of over 4,000 ft., and descends rapidly to Moonlight Creek, which it crosses 
at a height of 1,800 ft. above the sea. At Dead Horse Gully, still further south, it again reaches 
the same level, whence, crossing a spur descending from Ben More, it descends to the Twelve- 
mile Creek and Lake Wakatipu. On the shore of the latter it is 65 ft. wide, and looks as if 
it might descend for many hundreds of feet below the surface of the lake ; but of this we 
know nothing. 

From the surface of Lake Wakatipu, at some 1,000 ft. above the sea, to the shoulder of 
the Silverhorn, at 5,300 ft., we have an apparent involvement of 4,300 ft. But between Lake 
Wakatipu and the Silverhorn the schists might easily be faulted in such a way as to exaggerate 
the infolding of the marine beds, and for that reason we must rely on the Stony Creek section, 
where the entangled band is exposed in a beautiful transverse section for a vertical height 
of 3,500 ft., as shown in the next figure : — 



Silyerhorrb S686' / 




Fig. 15. Section at Stony Creek : Tertiaey Beds involved in Schists. 

a. Silvery-grey mica-schist, not crushed. 6. Mica-schist, crushed and contorted. c. Chlorite- 

Bchist, not crushed. d. Silvery-grey mica-schist. e. Outcrop of band of Tertiary sand- 

stone and conglomerate, at 5,300 ft. above the sea, on the east slope of the Silverhorn. 



The main significance of this narrow band of involved Tertiaries lies in the evidence 
it affords as to the age of the mountains of Western Otago. Here we have a portion of a 
marine littoral involved in a great crust-fold, and elevated to a height exceeding 5,000 ft. 
above the sea, affording the clearest proof that a sea-floor existed in the early Miocene where 
the Richardson Mountains now stand. 

The constituent rocks and fossils of the Marine band are such as would be deposited on the 
shores of a rocky strand, and, as mentioned before, we find on examining the Bob's Cove 
section of the Oamaru Series that only the basement horizon is entangled among the schists. 
By what singular happening this has occurred is not quite easy to explain. The section exposed 



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65 

along the shore of Lake Wakatipu, westward from the involved breccia-conglomerate, for 
a distance of 20 chains is shown in Fig. 16 below : — 



/ f 




cL 






-ZTTZT^^m^^^rmTiMm^ 



/ h // 



a> 



Fig. Ifi. Section from Bob's t'ovE towards Twelve-mile Creek, showing involved Miocene 

Tertiaries. 

a. Mica-schist, cTushed and bieiciatetl. 6. Mica-schist, soft and crumbling. c. Tertiarv 

calcareous breccia-conglomerato, 6") ft. thick. d. Marly clays. e. Marly sandstones, 

/. Limestone. g. Sandstone and conglomerate. 



The Warping of Tertiaries at Bob's Cove. 

The limestone and associated beds abut against the shore of the lake. For the first 
15 chains they strike a little to the east of north 5° (true), and dip west at an angle of 55°, 
the limestone forming the crest of the ridge. Beyond this distance they turn sharply to the 
west, bearing some 255° or 260° (true), the dip being now to the south at angles of 55° to 60°. 
The westerly course is followed until the trigonometrical station is reached, where the lime- 
stone and sandstones once more swing round to the northward, the dip being again west- 
ward at an angle of 60°. Seven chains north of the survey station the beds end quite abruptly, 
forming a steep escarpment facing northward. 

This extraordinary warping of the Tertiary beds in a horizontal plane is shown in 
Plate XXVIII, facing this page. The section across the limestone ridge is represented in 
the next figure : — 

isao' 




Fig. 17. Section across Limestone Ridge at Bob's Cove. Lake Wakatipu. 

3. Sandstones and conglomerates. 4. Sand-stones. 5. Limestone, 6. Marly sandstone, 

7. Marls and marly clays, 
5 — Queonstown. 



66 

The thickness of Tertiar}* beds exposed to view is probably somewhat over 1,500 ft., 
and we find that, while the basement bed has been deeply involved in an overturned fold of the 

schists, the greater part of the formation has been pushed back at right angles to the normal 
north-and-south course for a horizontal distance of some 17 chains, or 374 yards. The beds 
are simply bent, and show no signs of crush or faulting. At the end of 17 chains the beds 
are again bent at right angles, and then resume their northerly course. 

The band of calcareous breccia-conglomerate that is entangled in the schists pursues 
an almost straight course towards Moonlight, and does not, so far as can be seen, partake 
of the warping of the upper members of the Marine Series. This would indicate that the upper 
members were warped and twisted before the involvement took place along the Moonlight 
fold. But here we are met with the obvious difficulty that whatever warping affected the 
upper portion of the Marine beds should have also warped the lower, and of this there appears 
to be no evidence. If, on the other hand, the infolding of the breccia-conglomerate took place 
before the warping of the limestone and upper members of the same series, we should natu- 
rally expect that the movements or forces able to cause the distortion and warping of such 
a great formation should have also deformed the adjacent schists with their thin band of 
infolded strata. 

The mechanics of the movement or movements which caused the warping are not easy to 
understand. All that we can be reasonably certain about is that the Tertiary limestone 
series before the warping ran north and south, and occupied a much greater linear extent 
of ground than at present, and that a tangential force acting from the north, or from the south, 
pushed and folded the strata back so as to be sharply bent at right angles at two places within 
a short distance of each other. 

Thickness of Tertiary Beds. 

It is not a little singular that the isolated patch of the Oamaru Series should show a 
thickness that is not often exceeded in other parts of New Zealand, even where the forma- 
tion is ver}' fully developed. The visible thickness is about 1,500 ft., being made up as 
follows : — 

a. Sandstone and conglomerates, passing downward into bands of 

impure limestone . . . . . . , . . . 280 



Ft. 



h. Pure limestone 

c. Sandstones, marly and clayey 

d. Marly clays 

e. Calcareous breccia-conglomerate 



50 
500 
600 

65 



Thickness exposed . . . . . . . . . . 1,495 

The total thickness of the series is doubtless much greater than 1,495 ft., as the actual 
thickness of the upper sandstone and of the marly clays is not seen. 



Fossil Contents. 

The breccia-conglomerate of Bob's Cove is a limestone, in which so much broken schist 
in small angular pieces has been incorporated as to give the rock the appearance of a rough 
rubble concrete. In this brecciated rock there are numerous pieces of broken shells, but 
they are all so fragmentarj" that none of the genera to which they belong can be identified, 
with perhaps the exception of the genus Ostrea. 

At Stony Creek the genera identified were Venus, Pinna Ostrea WvUerstorfl, Turritella, 
Natica, and Dentalium, 



67 

lu the upper part of the marly clays at Bob's Cove were found a large Cucullaa that 
resembles C. cUta, Limopsis, Pecten, Natica, Dentalium, and some corals. Most of these were 
also seen in the overlying marly greensands. 

The limestone is composed mainly of comminuted shells and coralline structures. A 
small echinoderm is fairly abundant, but no example was found sufficiently well preserved 
to enable the genus to be determined. There is a band of sandstone near the base of the 
limestone, in which a small Turritella occurs in great abundance. 

The sandstones and conglomerates overlying the limestone contain a few scattered casts 
of shells, but all of them that were seen were too indistinct for identification. 

Age of Marine Series. 

The general fades of the fossils is that of the Oamaru Series, but the evidence is not 
altogether satisfactory', the absence of Pseudomn.ssium Iluttoni, Scalaria, and other forms, that 
are elsewhere characteristic of that series, being somewhat puzzling. On the other hand, the 
presence of the large oyster, of CucuUaa alta, and Dentalium Mantelli, and the absence of 
any distinctively upper Secondary forms, favour the lower Miocene age ascribed to these 
beds. 

Economic Value. 

The marly clays near the base of the scries, the limestone, and the overlying .sandstone 
are all of great economic value. Their prospective value, and the uses to which they can 
be applied, and the prospects of finding coal in them will be discussed in the chapter devoted 
to " Economic Geology." 

Pleistocene. 

a. Terrace-gravels, old fans, and modified glacier-drifts. 

b. Boulder-clays and moraines. 

The great Mount Nicholas moraine, Queenstown moraine, and Miller's Flat moraine have 
already been described in Chapter III, dealing with " Glaciation," and need not be referred to 
at any great length here. They consist of tumbled deposits of .sands, clays, and fluvio-glacial 
gravels, mingled with large masses of schist and greywatke. The fluvio-glacial gravels are 
mainly composed of greywacke pebbles and boulders that are foreign to the district, having 
been transported to the Queenstown and .^rrow areas by the agency of glacier-ice. 

The distribution of the greywacke gravels affords valuable evidence as to the direction 
of flow of the various streams of ice that were diverted from the main Wakatipu glacier. 

One rock-laden stream of ice pushed its way far up the T\venty-five-mile Creek ; two 
streams flowed into Moke Creek, one by way of Lake Dispute, the other by Lake Kilpatrick. 
Another stream, a small one, found its way through Arthur's Pass into the lower Shotover ; 
while a great stream .separated itself from the trunk glacier and flowed down the Kawarau 
Valley, its selvages spreading over the summit of Queenstown Hill and around the flanks 
of Bowen Peak. 

The gravel terraces in the Shotover that have proved so rich in gold consist mainly of re- 
sorted fluvio-glacial material. Down to the mouth of Moonlight Creek the gravels of the 
Shotover consist entirely of schistose material, with occasional boulders of hornblende- 
lamprophyre, and of the fo.ssiliferous marine conglomerates involved along the great Moon- 
light shear-plane, the only exception to this being the small boulder of granite found in 
Stevenson's Claim at the mouth of Skipper's Creek, to which reference has already been 
made. 

Below the mouth of Moonlight Creek the Shotover gravels contain a sprinkling of grey- 
wacke material brought down by Moke Creek to Moonlight Creek, At Arthur's Point, and fronrj 
5*— Queenstown 



68 

there to the Kawarau River, the Shotover gravels contain a large proportion of greywacke, 
mainly derived from the sheet of boulder-clay that covers the surrounding ridges and downs. 

At the time Lake Wakatipu was joined to Lake Hayes and occupied the greater part of the 
Arrow Flat, the Shotover ran at a higher level, and carried its load of material, mainly schistose, 
down to the upper end of Frankton Arm, in time forming what is now known as the Frankton 
Flat. A good section of this terrace, which is about 180 ft. high, is seen at the crossing of the 
Shotover on the road to Arrowtown. 

It is noticeable that, while the surface of the terrace is almost level, the gravels com- 
posing it, besides showing current-bedding, are often arranged in rudely sorted layers that 
lie at an angle of 25° or 30° to the horizon, like the material thrown over the end of a 
miner's dump. From this we know that the Shotover discharged its load into the still waters 
of the lake, and as the process of reclamation progressed it carried its load further and 
further, the new material being continually tipped over the end of the advancing face of 
gravelly debris. 

The Shotover also carried a large amount of fine sand and mud, which was borne still 
further into the lake — that is, nearer the present course of the Kawarau — before it finally 
subsided. .The fine muds settled slowly in the still water, forming the thin-banded layers 
of silt and rock -flour we now see on the edge of the Frankton Terrace below the Kawarau Falls. 

The saddle at Arthur's Point is occupied by greywacke gravel and patches of the Shotover 
schistose gravel, and here we have a good example, although on a small scale, of reverse 
drainage. 

The Arthur's Point glacier flowed upward from Queensto^vn, and, crossing the saddle, 
joined the Shotover glacier, but it was drained by a stream that flowed in the reverse way — 
that is, towards Queenstown. 

At the time of the retreat of the Shotover glacier the Shotover River ran at the level of 
the high terraces opposite Arthur's Point. The present deep channel or gutter in which the 
river runs had not then been excavated. That is a work of comparatively recent date. The 
Arthur's Point terraces are as high as the saddle, and it is almost certain that a portion of the 
Shotover River flowed across Arthur's Point Saddle to Queenstown, and continued to do so 
until the new channel to the Kawarau was cut so deep as to draw the whole of the drainage in 
that direction. 

The contour of the gromid, and the existence of the high terraces at Arthur's Point, led 
some of the pioneer gold-miners to think that perhaps the Shotover River at one time flowed 
across the saddle to QueenstowTi. But the great terrace forming Frankton Flat, the shallow 
channel and arrangement of gravels at Arthur's Point Saddle, prove that the main direction of 
the Shotover drainage was .always towards the Kawarau, as it is now, and that only a small 
portion of that river at any time drained towards Queenstown. 

Calcareous Ooze at Lake Hayes. 

Reference has already been made to the thinlyjjlaminated muds and silts in the Frankton 
Terraces, on the side fronting the Kawarau River.U |Thin- bedded silts are also well seen below 
the Kawarau Falls ferry, and in the road-cuttings at the south end of Lake Hayes. At the 
latter place they are interlaminated with whitish-grey bands of a fine calcareous ooze, that, 
going eastward and westward from the outlet, become very pure, forming a deposit of con- 
siderable thickness. 

This deposit of calcareous ooze, or soft incoherent limestone, is of great value for agri- 
cultural purposes, and already several hundred tons of it have been excavated and sent to 
Southland as a fertiliser. 

This deposit, to which further reference will be made in the chapter on "Economic 
Geology," is a calcareous tuff, and doubtless owes its origin to the action of moss, rushes, 



69 

and perhaps certain fresh-water algae, in causing the precipitation of the carbonate of lime from 
the waters of the lake. 

Character of Erratics. 

Besides greywacke and greenstone tuffs, which are found in endless variety, there occur 
in the boulder-clays that are scattered over Queenstown Hill and Arrow Flat many varieties 
of crystalline rock, among which are hypersthene-diorite, augite-diorite, hornblende-diorite, 
norite, hornblende-syenite, and granite. 

Dyke rocks are represented by hornblende-lamprophyres, some of which are related to 
the camptouite type. These are fairly coimuon in the Shotover gravels. A large boulder of 
saxonite was found near Lake Johnson among the erratics of crystalline rock that are so 
abundant there , and a pebble of feldspur-jjorphyrite was discovered in the fluvio-glacial 
drift behind Queenstown Domain. 

Among the holocrystalline granular basic rocks the norites are the most interesting. 
They are mostly dark-grey in coloui", and coarse in texture, with a specific gravity ranging 
from 2-76 to 2-86. 

Petrology of Crystalline and hjneous Rocks in Fluvio-glacial Drifts. 

The crystalline and igneous rocks found in the Huvio-glacial drifts of the Clutha and Kawa- 
rau drainage-areas were collected and examined during the progress of the geological survey 
in the Alexandra, Dunstan, and Cromwell district.s in the summers of I905-() and 1906-7. 
The same course has been pursued during the geological survey of the Shotover and Middle 
Wakatipu districts, the objrt;t steadily held in view being the tracing of these rocks to their 
sourci'. The work of the past season, in the summer of 1907-8, has served to show that investi- 
gation will have to be pushed still further north and west before these much-travelled rocks 
are traced to the parent source. 

No. SK III. — Ilorttblende-lamprophyre. — This is a black close-grained rock, fairly 
common in the high - level terrace drifts of the Shotover at Skipper's Point. Specific 
gravity, 296. 

In thin slice, viewed under the microscope, it is seen to consist essentially of needles and 
prisms of hornblende, in a groundmass of idiomorphic brown hornblende and magnetite-dust. 

Hornblende is the dominant constituent. It occurs in two generations — namely, as 
light-green prisms, and as long needles of a brown variety. The latter often taper at the 
ends, and are sometimes twinned parallel to the prismatic axis. 

No feldspar is recognisable, and if present is certainly not iJiomorphic. 

Calcite is so abundant that the hand-specimen of the rock effervesces freely, when hydro- 
chloric acid is applied to it. 

Magnetite is abundant in distinct grains, and as an exceedingly fine dust throughout 
the groundmass. 

The calcite is probably a decomposition-product of a residual feldspathic base. 

No. SK IV. — Hornblende-lamprophyre. — This rock occurs as pebbles in the Shotover 
and in the Queenstown moraine. It is black or blackish- brown, and very close-grained. 
Specific gravity, 296. 

When e.xamined under the microscope in thin section it is seen to consist mainly of pale- 
green prisms and long dark-brown lath-like prisms of hornblende, set in a groundmass of 
idiomorphic brown hornblende, magnetite, and what appears to be a glassy residue. 

The hornblende is present in two generations — that is, in large, well-developed, pale-green 
or colourless prisms, and as the brown variety, which is strongly pleochroic, and occurs both 
as long lath-like prisms and as short needles, and stumpy well-formed crystals that crowd 
the "roundmass. 



70 

Feldspar appears to be absent, or, if it forms part of the base, is not distinguishable. 
Apatite occurs in long thin needles, and magne'.ite, both as distinct grains and as a fine dust, is 
plentiful.' Calcite is abundant. 

The hornblende is the dominant coioured mineral in the rock, the dark-brown variety 
being the most abundant. 

This rock is almost identical with No. SK III. It is related to the camptonite type of 
lamprophyre, but on account of the feldspar being indeterminate in the sections examined it 
has not been classed as such. 

No. SK V. — Horvblende-lamprophyre. — This is a black to blackish-brown fine-grained 
rock. Specific gravity, 2-90. 

In thin section the rock is seen to consist essentially of hornblende in two generations, 
with apatite as an accessory and calcite and magnetite as alteration-products. 

The hornblende occurs sparingly as a pale green variety in well-developed prisms, and 
abundantly as the dark-brown variety in small, short, narrow prisms, generally with imperfect 
or corroded ends, and in stumpy well-formed idiomorjjhs that are often coffin-shaped. In some 
sections there are also a few long lath-like prisms of brown hornblende, similar to those seen in 
Nos. SK III and SK IV. 

Magnetite is very abmidant, mostly in distinct grains. Calcite, as a decomposition- 
product of the feldspathic base, is fairly abimdant. 

No. SK VI. — Hornblende-lamprophyre. — This rock occurs as pebbles in the Shotover 
gravels, and is also found near Frankton and at Queenstown moraine. It is close-grained, and 
almost black in colour, showing no phenocrysts to the unaided eye, but in places is speckled 
with white spots. Specific gra-\dty, 3-02. 

When viewed in thin slice under the microscope, the rock is seen to consist mainly of lath- 
like prisms of brown hornblende, with well-defined edges set in a pale bluish-grey feldspathic 
base. 

Hornblende also occurs in small, broad, dark-brown idiomorphs with sharply defined 
terminations. 

Idiomorphic feldspar is entirely absent, but the clear glassy residue is probably feldspathic. 
Apatite, in long thin needles, is common, and calcite, as an alteration-product, is abundant 
in some sections. Magnetite, in large irregular patches, but more often in small grains, is 
plentiful. 

Saxonite {Hartzbergite). — This rock was found near Lake Johnson, as a boulder about 2 ft. 
in diameter. It is excessively tough, and has a dirty olive-green colour. Its specific gravity 
is 3-17. Decomposition is well advanced on the surface skin. The cataclastic structure, so 
often seen in peridotite rocks is distinctly developed in this rock. 

In thin slice, viewed under the microscope, the rock is seen to consist of olivine, with 
serpentinous matter and large plates of colourless enstatite. 

The oli^^ne occurs in grains and allotriomorphic crystals, that are much cracked and 
fissured, the crevices being occupied with serpentine. In fresh plates the birefringence is 
brilhant. 

The enstatite occurs in broad colourless allotriomorphic plates, that often show a marked 
longitudinal striation which imparts a conspicuous fibrous or laminated appearance. Inclu- 
sions of calcite and serpentinous matter are abundant. Polarisation -colours are brilhant. 

In the serpentinous matter there are irregular patches of magnetite and a Uttle ferric 
oxide. There are also a few grains of an opaque brass-coloured mineral that is doubtless 
secondary pyrites. This rock probably came from the serpentine and olivine belt that 



71 

extends as a more or less continuous line from the Caples River to the Red Hill, at the 
source of the Pyke River. 

Saxonite, the hartzbergite of Rosenbusch, has been described from the Red Hill country 
by Professor Uli'ich (Quart. Jour. Geol. Soc, xlvi, 1890, p. 627) ; boulders of hartzbergite, 
by Dr. Marshall, at Milford Sound (Trans. N.Z. Inst., vol. xxxvii, 1904, p. 483). Lherzolite, 
a rock closely related to saxonite, has been described by Dr. Marshall from the olivine country, 
at source of Hidden Falls Creek (Trans. N.Z. Inst. vol. xxxviii, p. 564). 

No. M I. — Norite {Hypersthene-gabbro). — This is a dark-grey granitoid rock, fouad as a 
boulder in Scanlon's Gully, near Macetown. It is the only example in the Macetown district 
or upper Arrow Valley, and is undoubtedly an ice-borne erratic. 

When examined under the microscope in thin slice the rock is seen to be holocrystalline, 
and to consist essentially of plagioclase and hyperstheiie, the former being the dominant 
constituent. 

The plagioclase occurs in broad much-twinned plates, and in smaller crystals also well 
twinned. The large plates belong to a basic variety, and are probably labradorite. The 
smaller crystals may be anorthite. All are comparatively fresh. 

The hypersthene is abundant in allotriomorphic crystals, faintly ploochroic, and sometimes 
altered to serpentinous matter, calcite, and magnetite. 

Magnetite is abundant in grains and in interpenetrating threads. 

A little biotite is present as an accessory. 

No. J III. — \onle. — This is a dark-grey granitoid rock, with pale-pink feldspars. Specific 
gravity, 2-76. Found in glacial till near Lake Johnson. 

When examined under the microscope in thin slice it is seen to be a holocrystalline aggre- 
gate of plagioclase and hypersthene, with a little accessory biotite. 

The plagioclase occurs in large irregular plates, nmch twinned. It is of a basic type. 

Hypersthene is very plentiful in allotriomorphic crystals ; colour, pale ; pleochroism, 
feeble ; borders of crystals sometimes show alteration to chlorite. 

Magnetite is abundant. 

No. J y. — Norite. — This rock, like the last, occurs in large boulders in the glacial till 
covering the western slope of Ferry Hill, near Lake Johnson. It is a dark, granular, crystalline 
rock, with conspicuous Hakes of biotite and pink feldspar. 

In thin slice, it is found to consist essentially of plagioclase, hypersthene, and a brown 
mica, probably biotite. 

The plagioclase is a basic variety. It occurs in tabular plates, polysynthetically twinned, 
and commonly not very fresh, and also in smaller idiomorphs, well twinned and fresh. 

The hypersthene predominates. It occurs in allotriomorphic crystals and rounded grains ; 
schiller structure is well developed ; pleochroism fairly pronounced ; alteration to a serpen- 
tinous product common, 

Biotite is abundant, in irregular plates ; pronounced pleochroism ; often altered to 
chloritic mineral and magnetite. 

Apatite occurs in large idiomorphic prisms and short broad forms. Magnetite is iioi 
abundant. 

No. J I. — Norite. — A greyish granular rock, found near Lake Johnson, showing pink feld- 
spars and a dark ferro-magnesian mineral. Specific gravity, 286. 

In thin slice, under the microscope, is seen to be a holocrystalline aggregate of plagioclase 
and hypersthene. 



72 

The plagioclase is mostly fresh. It occurs in allotriomorphic crystals that exhibit pro- 
nounced twinning. 

The hypersthene is common. It occurs in irregular plates ; shows schiller structure, 
due to inclusion of niagnetite along solution-planes. 

Magnetite in separate grains is not abundant. 

This rock is almost identical with No. J III. 

No. A II. — Hornblende-diorite. — This occurs as pebbles and boulders in the gravels of Bush 
Creek, near Arrowtown. It is a dark-grey granitoid rock. Specific gravity, 2-89. 

When examined in thin slice it is found to be a holocrystalline aggregate of plagioclase and 
hornblende, with biotite as an accessory. 

The plagioclase is plentiful in irregular plates, well twinned, but often clouded by decom- 
position-products. 

Hornblende is green, and very plentiful in allotriomorphic plates with resorption borders ; 
pleochroism pronounced ; shows signs of alteration to chloritoid mineral, with inclusions of 
magnetite sometimes twinned. 

Biotite is present, but not abundant. Apatite occurs in long needles penetrating the 
feldspars. Magnetite is abundant, in irregular patches and irt small grains. 

No. J II. — Hornblende-diorite. — Found in glacial till near Lake Johnson. This is a fine- 
grained grey rock, with coarser granitoid segregations. Needle-shaped hornblende crystals can 
easily be distinguished by the unaided eye. Specific gravity, 2-69. 

In thin slice the rock is seen to be holocrystalline, and to consist essentially of plagioclase 
and hornblende. 

The plagioclase occurs in well-twinned plates, and is the dominant feldspar. A little ortbo- 
clase is present ; commonly altered to kaolin and sericitic matter. 

The hornblende is the green variety. It occurs in irregular plates ; fairly abundant ; 
shows alteration to chloritoid mineral. 

Apatite is common, in long needles. Magnetite is very common as an alteration-produci 
of the biotite. 

No. Q I. — Hornblende-diorite. — This rock occurs as rounded pebbles in the Queenstown 
moraine. It is a dark-grey granitoid rock. Specific gravity, 2-92. 

In thin slice it is seen to be a holocrystalline aggregate of feldspar and hornblende, with a 
little accessory biotite. 

The feldspar is mainly plagioclase, which occurs in two generations — namely, in large 
irregular plates, much twinned, but clouded by alteration-products, and small irregular 
crystals, commonly quite fresh, with few inclusions. 

The hornblende is the green variety ; abundant in large crystals ; often much altered to 
chloritoid matter, with numerous inclusions of magnetite. 

The biotite occurs in irregular plates. Apatite is common, in needle-shaped prisms. 
Magnetite is plentiful. 

No. Q III. — Hornblende-syenite. — This is a dark-grey fairly fine-grained rock, found 
m Queenstown moraine, showing thin needle-shaped crystals of hornblende. Specific 
gravity, 2-79. 

In thin slice it is a holocrystalKne aggregate of feldspar and hornblende, with accessory 
biotite. 

The dominant feldspar is orthoclase, which is commonly much altered and clouded by 
sericitic matter. Twinning is seldom seen. 



PLATE XXIX. 







1. HORNBLEXDE-I.AMPROfHTHE (CaMPTONITB TtPe). 

2. IIoHNBLEXDE-LAMPROrHYKE. 

3. HoKNnr.ENDE-i.AMi'HOPHYHE (Camptomte Type). 

4. HoKNIil.EXDE-I.AMPHOPHYHE. 



Magnified 30 times. 



No8. 1 and 3 photo Jainrn Pari-.] 



[Xof. 3 and .'/ p/iolo II . Ilui 



iltt 



Bulletin No. 7.] 



\To fare p. 



PLATE XXX. 






Photo H. Ratiiilton.'] 



1, 2, 3. (juaxite. 
Magnified 30 times. 



PLATE XXXI. 







.Vo. / pilot/: II. Hamilton.] 



1 and 2. Nohite. 

o. HoitXBI.EXDE-SYEMTK, 
4. IloRXBLEXUE-DIOUrrE. 

Magnified 30 times. 



[•Vos. 2, 3, and If [iliolo .lames I'uik. 



73 

The hornblende is green, and occurs in allotriomorphic plates ; commonly much altered, 
Stiongly pleochroic. 

Biotite is not common. Quartz occurs in small bimches. Apatite and zircon are present. 
Magnetite is fairly abundant, in irregular grains. 

No. Q IV. — Hornblende-syenite. — This is an even-grained granitoid rock, showing pheno- 
crysts of feldspar and hornblende, and a little pyrites. 

Under the microscope it is seen to be a holocrystalline aggregate of orthoclase and horn- 
blende. 

The orthoclase occurs in large irregular plates, rendered almost opaque in places with 
alteration-products. The twinning is obscured by the kaolinization. 

The hornblende is green ; in irregular plates ; decomposing to chlorite and magnetite. 

Pyrite is not abundant ; occurs as small cubes. Zircon is common. Magnetite is plentiful 
as an alteration-product of the hornblende. 

No. SK I. — Granite. — A small boulder in Stevenson's Sluicing Claim at Skipper's Point ; 
apparently an erratic. It is a light-coloured crystalline aggregate of feldspar, biotite, and 
quartz. 

The orthoclase is not abundant. It occurs in small idiomorphic plat«s, with well-marked 
binary twinning ; shows alteration to kaolin and calcite along borders. 

The biotite is completely altered to chlorite, which is in places stained brown with iron- 
peroxide. Quartz is the chief constituent of the rock, in large irregular crystals sometimes 
containing inclusions. 

Sphene, zircon, and apatite are common. Magnetite is fairly plentiful. Calcite is present, 
but not abundant. 

No. J IV. — Granite. — From a boulder in glacial till near Lake Johnson. It is an even- 
grained rock showing quartz, feldspar, and dark mica. 

The feldspar is mainly orthoclase and oligoclaso, the former commonly much kaolinized, 
the sericitic inclusions being symmetrically arranged. 

The biotite occurs in irregular plates that are often altered to chloritoid matter and 
iuagnetite. 

The quartz occurs in small interstitial grains, but is not abundant. Apatite is plentiful, in 
long needles. Sphene and magnetite are present, but not at all common. 

Recent, 
River-beds, AUunal Flats, Swamps, dtc. 
The contours of the country are so steep, and the valleys so narrow, that the area included 
under this heading is comparatively insignificant. The river-bed gravels are largely a rewash 
of the gold-bearing fluvio-glacial drifts forming the high terraces perched on the sides of the 
valleys, and, like them, have proved a valuable source of wealth. The beds of the main and 
lateral streams formed natural sludge-channels, in which for countless ages the gold, released 
from gold-bearing veins in the adjacent mountains and gathered from the re-sorting of the 
terrace-gravels, became concentrated, as in the sluice-box of the present-day miner. 



74 



CHAPTER VII. 



ECONOMIC GEOLOGY. 







Page 






Introduction . . 


.. 74 


Gold-bearing Lodes — contuiued. 


Quartz-mining 


.. 74 


Skipper's Point and Shotover Lodes- 


Economic Possibilities 


.. 74 


continued. 


Gold- bearing Lodes 


.. 75 


Peat's Lode 


Summary of Characteristics . . 


.. 75 


Junction Lode No. 1 




Gold-bearing Lodes in Macetown D 


s- 


Junction Lode No. 2 




trict . . 


. . 76 


Bridge Lode 




Sunrise Mine 


. 


. . 79 


Lodes in Stevenson's Claim 




Tipperary Mine 




.. 79 


Eureka Lode 




Killarney Line of 


Lode 


.. 79 


Skipper's Gorge Lode 




Dublin Lode 




.. 79 


Scheelite 




Anderson's Lode 




.. 80 


Copper 




Sylvia Lode 


. . 


.. 80 


Moke Creek Coj)j)er Lode 




Arrow Lodes 




.. 80 


Skipper's Point Copper Zone. 




Alpha Lode 




. . 81 


Antimony 




Gamma Lode 


. . 


. . 81 


Advance Peak Lode 




Delta Lode 




. . 82 


Skipper's Point Antimony 




Iota Lode 


. 


.. 82 


Alluvial Mining 




Zeta Lode 




.. 82 


Terrace-gravels 




Lambda Lode 




.. 82 


River- and Stream-bed Wash 




Pyritic Lode 




.. 83 


Lake Hayes Limestone 




Criterion Lode 




.. 83 


Bob's Cove Limestone 




Cornish Lode 




.. 84 


Bob's Cove Marl 




Columbia Lode 




.. 84 


Coal 




Bullendale Lodes 




. . 84 


Building-stones 




Achilles Mine (Old Phoenix) 


. . 84 


Altered Greywacke . . 




Skipper's Point and Shotover Lodes 


. . 86 


Bob's Cove Sandstone 




Shotover Consolidated Mine 


. . 86 


Bob's Cove Limestone 








Introd 


UCTION. 





Page 



88 

89 

90 

91 

92 

94 

94 

94 

94 

94 

95 

95 

95 

95 

95 

96 

97 

97 

99 

100 

100 

101 

101 

181 

101 



The minerals and metals that have proved of economic importance in this district are gold 
and scheelite ; among those that may be turned to commercial account are the calcareous 
tuff or limestone at Lake Hayes, the limestone at Bob's Cove, and the marl at the same place. 
Among the minerals that may be looked for with a reasonable hope of success are coal, copper, 
and perhaps antimony. 

Quartz-mining. 
Economic Possibilities. 

The lodes of Macetown and Skipper's occur in the same zone of mica-schist, and belong 
to the same type of replacement lode, as the reefs at Bendigo and Carrick Range in the 
Cromwell district. The lodes at Bendigo alone have yielded gold to the value of some three- 
quarters of a million sterling. The Premier and Tipperary mines, at Macetown, and the 
Phoenix Mine, at Bullendale, have produced a large amount of gold ; while we have still before 
us the Shotover Consolidated, that through various vicissitudes and adverse circumstances has 
been a going concern for nearly thirty years. 

The bulk of the gold produced in Otago in the past has been derived from alluvial sources, 
but the time is approaching when renewed attention will have to be directed to quartz-mining 
if the annual output is to be maintained. Gold-bearing lodes occur in nearly every gully and 
gorge in the Arrow, Macetown, Shotover, and Skipper's districts. In some places they are 
numerous. Many have been prospected at the outcrop by local companies and individual pro- 



76 

specters ; but numbers exist that liave not been touched or tested in any way. Description 
of some of these last will be found in the following pages. 

Many of the lodes are small, and perhaps the majority low-grade ; but low-grade ventures 
have often proved the most profitable, their successful working being dependent on two main 
and all-important factors — namely, adequate development in advance, and economy in 
working-costs. 

The Alaska-Treadwell Gold Mine, in Douglas Island, Alaska, is an object-lesson in the 
profitable working of low-grade ore. This mine has paid millions of pounds in dividends 
from a free-milling ore that has yielded gold to the value of only 12s. per ton — the working- 
costs amounting to some 8s. or 9s. per ton. At Bendigo, in Victoria, 3 dwt. and 4 dwt. ore is 
easily worked at a profit, even in deep mines. But we have no need to go abroad for an example 
of cheap mining. We have one at our door. Mr. Waters, consulting engineer for the Shot- 
over Consolidated, near Skipper's Point, has informed the author that the total costs for 
mining, milling, and management at that mine amount to only 128. per ton, which is a note- 
worthy result when we consider the high rate of wages, the scarcity and consequent high cost 
of mine-timber, and the heavy freight-charges on all mine-suppUes. 

Capable and economical management is the keynote of successful mining, for in a low- 
grade venture the profits may in a manner be said to come out of the savings. 

What can be done at one mine can be done elsewhere, and with costs brought down to 
3 dwt. of gold per ton there is warrant for the belief that quartz-mining is still in its infancy 
in Otago. 

In the district under review systematic prospecting ought to be carried on along the 
Sunrise and Premier-Tipperary lines of lode at Macetown ; on the lodes discovered by the 
Geological Survey in the Arrow (Jorge near Arrowtown, more especially on the ridges between 
the Arrow River and Coronet Creek, and between the Arrow River and head of Bracken's 
Gully ; and at Bullendale and Skipper's Point. The lodes that have already been worked 
should be searched for the continuation of the pay-shoots of ore that were worked in the upper 
levels, and new lodes should be prospected in a thorough manner for shoots of profitable ore. 

Gold-mining is still an industry of paramount importance to Otago and to the Dominion. 
It stands unique ajnong.st the world's industries, in that its production is not a perishable or 
consumable commodity, but one that increases the currency and gold reserve, thereby stimu- 
lating industrial enterprise in many directions. As a matter of good policy it should be 
fostered by every legitimate means in the po .ver of the people and State. 

GOLD-BEARINO LODES. 

Summary of Characteristics . 

A close investigation of the Macetown, Skipper's, and Shotover lodes shows that they 
belong to the class of replacement lodes, in which a zone of country rock lying between two 
more or less parallel fissures has become crushed by wall-movement and more or less replaced 
by quartz, which is commonly gold-bearing. 

It may be of interest to state that the lodes of the Bendigo and Carrick Range goldfields, 
that proved so productive for many years, belong to this group of fissure-lode. 

The chief characteristics of these replacement lodes, which will probably be found to 
belong to a type of ore-deposit more common than is supposed, are as follows : — 

(I.) They lie between two more or less parallel fissures, enclosing between them a 
zone of country rock, which is always more or less crushed and shattered. 

(2.) They traverse the countrj' rock independently of the planes of bedding or 
foliation. 



76 

(3.) The enclosed zone of country rock has been crushed and shattered by the pres- 
sure exerted by faulting and wall-movement. 

(4.) The crushed rock is more or less silicified and replaced by quartz. 

(5.) The extent of the replacement varies in different lodes, and even in the same 
lode the replacement may be partial in one place and complete in another. 

(6.) The lode-matter often presents a brecciated appearance, due to the cementation 
of the broken rock by silica. 

(7.) In cases of partial replacement the crushed rock is commonly replaced by vein- 
quartz deposited on one or both walls ; but the vein-quartz may lie in any 
part of the crushed rock, forming irregular lenticular masses that may pass 
from wall to wall. 

(8.) In cases where replacement is more complete the veins on the opposite walls 
unite, thus forming a solid ore-body, enclosing between them a horse of 
country rock. 

In the majority of the lodes the bulk of the lode-filling is crushed rock, forming what is 
locally termed mullock, hence the name mvllock-lode often applied to them. 

Gold-bearing Lodes in Macetoum District. 

There are numerous gold-bearing lodes within the watershed of the Arrow River. They 
vary from a few inches up to many feet wide, and all contain gold in greater or less quantity. 

The Macetown lodes have so far proved the most productive. They occur in two dis- 
tinct systems — namely, the Tipperary system, which runs from Scanlon's Gully to Sawyer's 
Creek, where it is known as the Premier line of lodes ; and the Sunrise system, that crops out 
on Advance Peak at an altitude of some 5,000 ft. above the sea. Of these the Tipperary- 
Premier line of lodes has been the richest. It is enclosed in a comparatively soft, grey, 
silky mica-schist. It comprises four distinct lodes, all more or less parallel, and situated 
in the zone of mica-schist that lies on the upper or hanging-wall side of the strong bands of 
chlorite-schist that cross near the mouth of Scanlon's Gully. 

The Sunrise line of lodes is enclosed in a mica-schist that is somewhat more flaggy. It 
lies to the north of the Premier lodes. 

At the time of the author's visit to Macetown the Premier Mine had been closed down for 
some years, and for this reason there was no opportunity for an inspection or examination 
of the lodes that had been worked. 

According to Mr. Henrj^ A. Gordon,* the Premier section was worked from an incline 
adit 2,000 ft. long, with a grade of 1 in 4, from an intermediate level 180 ft. above, and from 
another level below the adit. The gold occurred in shoots of quartz, the remainder of the 
lode being filled with crushed country rock. 

For the following information relating to the Macetown lodes the author is indebted to 
Mr. L. 0. Beal, M.A.Inst.M.E., mining engineer, who has been at difierent times connected 
with the development of many of these mines : — 

" The Macetown reefs are fissure-veins with well-defined walls, carrying in many places 
a great thickness of pug. The hanging-wall of the reefs is the more defined and regular. 

' The stone is of a very free-milling nature, sometimes carrying a little and sometimes 
a good deal of pyrites, some of which is arsenical. The gold is of high grade, being worth 
from about £3 18s. to £3 19s. per ounce. It is readily visible in the stone, and much of it is 
coarse in character. The pyrites is sometimes barren, and sometimes contains a good deal 
of fine gold. 

* Papers and Reports Relating to Minerals and Mining, 1897, p. 120. 



77 

" The tendency of the lodes is to come together in depth. In many places there are from 
two to four reefs nmning parallel with each other, with occasional loops, carrying in some parts 
a large body of quartz ; in other parts, horses of mullock. 

" The nmllock occasionally carries small veins or stringers of quartz of considerable richness. 

" The underlie of the lodes is towards the south-west, their general direction being 310° 
(true). They contain between the walls shoots of quartz alternating with rubbly mullock 
and mullock with small veins or stringers of quartz. Occasionally there are small veins of quartz 
running from the walls into the country rock. 

" The shoots of quartz dip to the north-west at angles varying from about 25° to 75°, the 
average being about 40°. 

" One shoot of quartz containing rich stone was worked down from the surface through 
the Gladstone and Premier quartz claims to a depth of 3,300 ft. from the outcrop. At that 
depth the working-e.xpenses were so heavy, mainly for maintenance and timbering, that 
further following of the shoot at greater depth was abandoned. 

" This shoot was worked first frona the surface, then by adits, and finally by a dip-drive 
on the floor of the shoot. 

" The lodes as a rule do not contain any considerable quantity of water, which is seldom 
over 30 to 50 gallons per minute. 

" The mountains being very precipitous, there is every facility for mining by driving 
adits. In some places half a mile of driving would give 2,000 ft. of back% Great facilities 
are afforded also for the use of self-acting aerial tramways to get the quartz down economically 
and transport the timber to the mine for maintaining the levels and securing the stopes. 

" The stopes in some of the lodes required face-boards and struts (or toms), and in others 
the walls and contiguous countrj' -rock are so solid that an odd strut and f ace- board is sufificient. 

" The stopes are generally taken out in 7 ft. benches, and filled in again with nmllock or 
country-rock to prevent subsidence, and so maintain the stability of the workings. 

" Water-power is plentiful for working the batteries by means of water-wheels. 

" There are about eight main lines of lode, besides several smaller ones. The lode-forma- 
tion varies from a foot or two up to 30 ft. or 40 ft. in width. 

" The most extensively worked lodes are the Premier and Tipperary mines. Next in 
order come the Gladstone, Homeward' Bound, All Nations, Victor Emmanuel, Maryborough, 
Garibaldi, Sunrise, Golden Treasure, Balsh's, Hamilton and O'Neill's, and Anderson's. 

" As may be imagined, there are a good many dislocations of the shoots of gold, occasioned 
by small faults and slides, and also by veins coming in from the walls. 

" The old mine-surveys being in most cases insufficient, and seldom accompanied with 
proper longitudinal and'^cross-sections of the lodes and workings, the run of the pay-shoot of 
gold has often been lost. The fact of there being often two, three, or even four lodes coming 
together on the underlie, and all maintaining their individual walls, has made the shoots of gold 
difficult to follow without the guidance of an experienced mining engineer to supervise, survey, 
and keep the mining operations in proper order. 

" The average underlie of the lodes is from 50^ to 80°, the direction of dip being south-west. 
In a few places they are vertical." 

The present claims carrying on mining operations are Farrell's Mmes, Hamilton and 
O'Neill's, and Anderson's. With a heating plant in the batterj-building crushing can be 
carried on in most places right through the year, except in winters of unusual severity. 

Warden Stratford reports that the reefs at Macetown were first tested about the year 
1876. According to Mr. Mcintosh,* three lines of reef were first worked — namely, (I) the 
Homeward Bound line, (2) the Mar}'borough, and (3) the Advance Peak line. 

♦ Robert Mcintosh, A.O.S,M. " Quartz-miiung," " The New Zealand Mining Handbook," J906, p. 151, 



78 

The Homeward Bound line was opened in 1876 by Messrs. Raven and Barclay, who won 
551 oz. of gold from 542 tons of stone while opening up. On the same line, to the north-west, 
were situated the Lady Fayre, Gladstone. MacKay's, and the Premier claims. 

The Defiance line of lode runs parallel to the Homeward Bound, and on the east side. 

The Man-borough was opened up in February, 1876, and from 5 tons of stone crushed 
from a foot-wall leader. 23-5 oz. of gold was obtained. On this line were situated the leases of 
the Garibaldi Company, Duke of Wellington No. 2 South, Victor Emmanuel No. 3 South, and 
Firm's Lease No. 4. 

Mr. Mcintosh continues his interesting sketch in the following terms : — 

" The All Nations line is parallel to the Maryborough, about 5 chains to the southward. 
From a leader between these two Unes 345 tons of quartz yielded 39 oz. of gold. The Tip- 
perary, Geraldine, and Caledonian leases were continuations of the All Nations line, while the 
Canton and Ancient Briton claims were branches trending south. 

" With regard to the Main Lode line, there appear to be three parallel lodes here trending 
north-west. Several rich leaders radiate from these lodes, as high as 5 oz. of gold per ton 
having been obtained from them. The Katherine was a rich leader from the north-east lode 
of this parallel. Development-work was carried on, and in 1878 a public crushing plant was 
erected and quartz crushed from various reefs. Some of these parcels, which were said to 
be well representative of the quartz in the mines, gave rich yields. Eighty tons of quartz from 
the Gladstone Mine yielded 304 oz. of retorted gold ; 50 tons from the Tipperarv- yielded 127 oz. 
For some time the stone from the Tipperar}' Mine yielded nearly 1 oz. 8 dwt. of gold per ton. 

" It would be impossible in this short sketch to detail the histoiy- of this district during 
the next few years. Numerous leases were taken up, but operations were not successful 
in all cases. Capital was required, as the district for some years was only provided with a 
pack-track. In 1884 the main road from Arrowtown was opened for traffic. 

" Warden Hawkins, reporting in 1886, says, ' Of all the numerous gold-mining companies 
that were called into existence on the discovers- of payable quartz at Macetown only two 
remain, of which the Premier Mine has been the most successful.' 

" During 1886 the Sunrise Lease Gold-mining Company struck good stone, and was the 
only mine at work during 1888 and 1889. In the latter year an endeavour was made to float 
a company on the London market to work the Premier and Tipperar\- mines. This flotation 
was completed, and British capital was introduced into the district in 1890. About this 
time prospects became brighter. The Sunrise struck good stone, and erected a new battery. 
Unfortunately, in 1891 expectations were not realised. Poor results were obtained from the 
Sunrise and Premier mines, while operations were not commenced at the Tipperary Mine. 
During 1892 the Sunrise Company sold its plant and claim to the Premier Consolidated Com- 
panv, which carried on continuous operations during the year for a return of 945 oz. of gold 
from 957 tons of quartz crushed. 

" The Tipperary Company was re-formed in London in 1892, with an available capital of 
£10,000, so that in this mine, as also in the Premier, development-work was carried on during 
1893. In that year the Premier Company crushed 3,163 tons of quartz for a yield of 
1,985 oz. The Glenrock Consolidated Company purchased the Premier and Sunrise mines in 
1895, and preparations were made to work these properties on a more extensive scale. 

" The Tipperary Gold-mines Company was reconstructed in 1896, and a new company, 
called the ' WestraUa and New Zealand Gold-explorers (Limited),' took possession of the pro- 
perty. Work was continued along the usual lines for the next few years. 

" In 1898 several well-known mines — the Victor Emmanuel, Morning Star, Black Angel, 
Garibaldi, Maryborough, Homeward Bound, Lady Fajrre, and Golden Treasure — were con- 
solidated into one holding as ' Farrell's Consolidated Mines.' The intention was to place 
these properties on the London market. Operations in the Tipperary and Sunrise mines were 



79 

not very successful, and the mines were closed down in 1899 ; but the Premier continued to 
be worked, 2,825 tons of quartz being treated for a yield of 1,661 oz. of gold during the year 
1899. The Indian Glenrock (Wynaad) Company continued operations in the Premier Mine 
during 1902, in which year 2,178 tons of quartz yielded 1,752 oz. of gold. 

" In 1903 the Premier-Sunrise (New Zealand) Gold-mining Company purchased the 
Premier Mine from the Indian Glenrock Company. The mine was worked continuously during 
the year, with fair results. 

" Work was resumed in the Tipperary Mine in 1903, but, as the further development of 
the mine included the installation of expensive machinery, operations have since been at a 
standstill. 

" The Premier-Sunrise Company continued operations during 1904 and 1905. In the 
latter year the available stone was stoped out, and considerable prospecting failed to open up 
a new ore-body." 

Sunrise Mine. — This mine is situated near the summit of Advance Peak, at an altitude 
of some 5,000 ft. above the sea. The mine has been closed down for some years, and all that can 
now be seen is the surface outcrop along the narrow ridge behind Advance Peak. 

The ground has been prospected by shallow trenches along the outcrop and by a low- 
level drive. The lode as it appears on the surface consists of irregular blocks of compact quartz, 
generally rust-brown in colour, and separated from each other by stretches of crushed comitry 
rock. 

The quartz has proved rich in some places and worthless in others. Mr. Gordon reports 
that a sample of 30 lb. yielded, by amalgamation, gold at the rate of 1 1 oz. per ton. On the 
other hand, 4 tons of ore yielded only 1 oz. 3 dwt. of gold. 

The lode is one that may yet be proved to contain a valuable shoot of pay-ore, but pro- 
specting at an elevation of 5,000 ft. is seriously handicapped by the severity of the winter, 
the ground being covered with snow from June till November. 

Mr. Stanford, the general manager of the Glenrock Consolidated (Limited), the proprietors 
of the Sunrise property, reporting on the work done on the Sunrise lode during 1898, stated 
that a considerable amount of prospecting-work had been done by means of crosscuts to 
prospect the adjacent country. The crosscuts proved the existence of two lodes, running apart, 
both carrying gold wherever they were struck, but not in payable quantity. The workings were 
verv' close to the outcrop, and the whole country was found to be much broken and disturbed. 

The former proprietors of the property, the Sunrise Lease Gold-mining Company (Limited), 
succeeded in extracting 1,207 tons of quartz from the mine, which yielded in the mill 1,018 oz. 
of gold, valued at £3,909. 

All the creek-beds below this mine have been sluiced for payable returns, and much of 
the gold obtained in the ripples was found to contain adhering particles of quartz. 

Tipperary Mine. — This mine, to which reference is made by Mr. Mcintosh, has now been 
closed down for some eight years. It is situated in Scaiilon's Gully, about two miles and a 
half from Macetown. When in operation it was worked by surfac* stopes, drives, and a shaft. 
A low-level crosscut 1,953 ft. long was put in at a point in the gully three-quarters of a mile 
below the mine, but where the lode was cut it was not payable. The lode was then driven 
on for a distance of 490 ft. — namely, 270 ft. westward and 220 ft. eastward. It was found 
to average about 4 ft. wide, and to underlie south-west at an angle of 68°, but unfortunately 
no payable ore was found at that depth. 

Killarney Line of Lode. — This is parallel to the last, and about 1,000 ft. to the westward. 
Little work has been done on it, except a little surface prospecting. 

Lhihlin Lode. — This lode strikes 310° (true), and stands nearly vertical. It is at present 
being worked by two levels from the surface, and a rise. Its width varies from 18 in. to 4 ft. 
The lode-matter consists of crushed and broken schist, through which there run a few small 



80 

veins of quartz. The ore is crushed in a stamper-battery, and yields from 6 dwt. to 16 dwt. 
of gold per ton. The mine is at present being successfully worked by Messrs. Hamilton and 
O'Neill, who have displayed much energy in opening up the ground. 

Anderson's Lode. — This lies about 500 ft. east of the Dublin line of lode. Its bearing- 
course is 329° (true) — that is, about north-north-west — and it stands nearly vertical. It varies 
from a mere thread or clay-parting to 30 in. wide. The mica-schist in which it is enclosed 
strikes about north-and-south, and dips west at an angle of 48°. 

The lode-matter consists of a zone of crushed and slickensided schist, traversed with veins 
of quartz that are gold-bearing. The prospects are at present very promising, and a small 
battery is being erected on the east bank of the Goldburn, near the mouth of Scanlon's Gully, for 
the purpose of crushing the ore and extracting the gold. This battery should also prove 
useful for the treatment of trial parcels of ore from other mines in the neighbourhood. 

Sylvia Lode. — This crops out on the north side of Bush Creek, at the first forks. Its course 
is 305° (true), and it dips to the south-west at an angle of 78°. It has been opened up by a 
low-level drive at the old battery level and several surface levels from Branch Creek, some 
600 ft. higher up the slope of the range. 

The lode-matter consists of crushed mica-schist and veins of quartz lying between two 
more or less parallel fractures. It varies from 6 in. to 4-5 ft. wide, and most of the quartz 
lies on the hanging-wall side. The walls are sharply defined. 

The sectional view of the lode, and its relationship to the enclosing mica-schist, is shown 
in the next figure : — 




Fig. 18. Sectional View of Sylvia Lode, Bush Creek, Macetown District. 



The vein of quartz lying on the hanging-wall varies from 4 in. to 8 in. thick. On the 
floor there appears, as shown in the above figure, the apex of another small vein that will 
probably increase in width in going down. 

This lode has the same bearing and characteristics as the lodes in the Tipperary-Premier 
system, to which it doubtless belongs ; but whether it should be correlated with the Premier, 
Lady Fayre, Homeward Boimd, or Maryborough lode is a point not easily determined. 

Arrow Lodes. 

In passing up the Arrow Gorge towards Macetown, the silvery-grey mica-schist is found 
to be traversed by a number of lodes and veins of quartz, almost all of which were found, on 
examination at the outcrop, to contain gold varying in amount from a few grains to several 
pennyweights per ton. Of these the Alpha, Gamma, Delta, Iota, Zeta, and Lambda lodes, 
hereinafter described, are new discoveries made by the Geological Survey during the progress 
of the field-work. They all lie in a zone of schist half a mile wide, and are more or less parallel 



PLATE XXXII. 




T AC r-^T^ 



M.Mii ui- MoLM Ali;l-.i, I'liuM West Sidk. 



/'/(r,/,, .l/iVf*- AspinalL] 




Advance Pkak, near Macetown. 



I' ho to James Park, 
bulletin Xo. ?.] 



[To far I' ji. SO. 



IM.ATE XXXIII. 




Skipper's Point Bkidge axd Gold-wokkixus, Shotoveh Uiver. 
Plioto MiJi'.< A.</jitiuU.] 



P[-ATE XXXIV. 




I l'l'i;i! Sii()i()\i;i! \.\i,i,i;y 















.J'^mc--^- 






J /. 



^^^N' 



^^^ 




J-AKK \V.\K.\TirU, WITH TlIK DoMK OK MolNT XkHOI.AS IX Till'; DiST ANCli 



PI.ATl' XXXV. 




/ \ 



.v^l 








Mount Aukum, looking mv Skiitek's Cheek. 




Sho'jovek Valley. 



81 

to each other. They have the same relationship to the chloritic-schist bands as the Tipperary- 
Premier lodes, of which the author is incUned to think they are the southerly continuation. 
They all contain gold, and are well worth careful and systematic investigation. 

Alpha Lode. — This is a well-defined vein of quartz that crops out on the side of the Mace- 
town Road, about 5 chains above the junction of the Arrow River and Bush Creek. Its strike 
is about 307° (true) — that is, nearly parallel with the Premier lodes — and it stands about 
vertical, there being only a perceptible inclination to the westward. 

The vein-matter consists of compact grey crystalline quartz, varying from 2 in. to 5 in. 
wide. A sample of the ore was found by fire assay to contain gold at the rate of 1"5 dwt. 
per ton. 

The Alpha lode does not appear to have been known till now. It is well-defined, and 
contains promising-looking stone.' By examining and prospecting it along the outcrop it is 
quite possible that a shoot of payable ore may be located somewhere along its course. The 
sectional view of the lode is shown in the following figure : — 




Fia. 19. Cross-section of Alpha Lode, near Aerowtown. 

(I'amma Lode. — This is found cropping out in the gorge of the Arrow, about 15 chains 
below the junction of First Creek and 10 chains above the old mining-camp half a mile from 
Arrowtown. 

The lode strikes about 303° (true), and stands practically vertical. It varies from 1 ft. 
to 5 ft. or 6 ft. wide, and consists of crushed mica-schist and quartz veins lying between well- 
defined walls. As seen at the outcrop in the face of the cliff, the quartz is found to vary from 
a mere thread to 8 in. wide. It occurs as two distinct veins, one on each wall, but uniting 
in going upward. 

The irregular character of the walls and the disposition of the veins of quartz are shown 
in the next figure : — 




Fio. 20. Cross-section of Gamma Lode, near Aerowtown. 
a. Mica-schist. b. Crushed schist. c. Quartz veins. 



6— Queenstown. 



82 

Samples of the quartz iu this lode when subjected to fire assay were found to contain 
gold at the rate of 1 dwt. 18 gr. and 2 dwt. 8 gr. per ton. 

The quartz veins vary from a thread to a foot thick, and, although not payable at the 
outcrop facing the Arrow River, may be found to contain payable ore at some place along the 
course of the lode. 

The Gamma lode is a new discovery, and should be systematically prospected by trenches 
at various points. Its course is almost parallel with that of the Alpha lode, described above. 

Delta Lode. — This was discovered cropping out some 80 ft. east of Gamma lode. It is 
a narrow vein of quartz, varying from a clay parting to 6 in. wide. Its strike is 312° (true), 
and it dips to the south-west at very high angles, commonly about 80°. The foot-wall is very 
clearly defined. 

A sample of the quartz from this lode gave a return of 1 dwt. 12 gr. of gold to the ton. 

Iota Lode. — This lode crops out on the bank of the Arrow River about 40 ft. east of Delta 
lode, which has just been described. It consists of two narrow branching veinlets of quartz, 
varying from 1 in. to 4 in. wide, enclosing between them a zone of crushed schist. 

The sectional view of these veins, as seen in the face of the river-cliff, is shown in the 
next figure : — 




Fig. 21. Cross-section of Iota Lode, Arrow Gorge, near Arrowtown. 
a. Mica-schist. 6. Crushed schist. c Quartz veins. 



The width between the walls of the lode at the level of the datum-line in the above figure, 
which is water-level, is 4 ft. 6 in. A sample selected from the eastern leg was found to contain 
gold at the rate of 1 dwt. 18 gr. per ton. 

Zeta Z/ode.^This is a small lode that crops out at the north end of the deep road-cutting 
opposite the mouth of First Creek. It strikes 325° (true), and stands practically vertical. 
It varies from 12 in. to 24 in. wide between the walls, which are sharply defined. 

A fair sample selected from the whole height of the exposure facing the Arrow River 
was found by fire assay to contain gold at the rate of 3 dwt. 4 gr. per ton. 

Lambda Lode. — This crops out on the bank of the Arrow, some 4 chains further east than 
the Zeta lode. It strikes about 318° (true), and is quite vertical or in places inclines slightly 
to the westward. The enclosing rock of this and of the lodes already described is a soft, 
crumbling, flaggy mica-schist with silvery-grey lustre. The dip is everywhere westward, at 
angles varying from 40° to 65°. In the vicinity of this lode the angle of dip is 42°. 

The lode-matter consists of a conipact body of yellowish-brown quartz, varying from 
6 in. to 18 in, wide. A sample was found to contain gold at the rate of 2 dwt. 18 gr. per ton. 



83 

The Pyritic Lode. — This crops out near the head of Shadrach Creek, at a height 
of over 2,000 ft. above the sea and 600 ft. above the bed of tlie Arrow River. Its 
course is about 35"^ (true) — that is, parallel with the upper part of the stream, in the bed 
of which it is exposed at several points. It stands vertical, and can be traced through a 
height of 200 ft. 

The lode has been opened up by trenches and surface drives, and, from what can be seen 
in these, it has a width varying from 1 ft. to 5 ft. The lode-matter consists of cruslied mica- 
schist, containing a vein of hard, pyritic, brecciated quartz, from 6 in. to 18 in. wide, lying 
on the western wall. 

About 250 ft. below the crown of the hill it throws off a branch lode, consisting at the 
surface of dark-red rubbly clays that contain irregular masses of hard, pyritic, brecciated quartz. 

A sample of the pyritic ore when submitted to assay was found to contain 2 dwt. of gold 
and 2-5 dwt. of silver per ton. 

The sectional view of this lode, as seen in the bed of the stream, is'as is shown in the next 
figure : — 




Fio. 22. Ckoss-section of Pyritic Lode, Shadrach Creek, Arrow Goroe. 
o. Mica-schist. b. Crushed schist. c Pyritic quartz. 



Criterion Lode. — This lode crops out on the bank of the Arrow River, near Arrowtown. 
Its course, as seen by the direction of the old workings, is about 315° (true), and it stands 
vertical or inclines slightly to the eastward. The old mine has been so long abandoned that 
little can now be gleaned by an e.xamination of the surface. The following particulars of the 
lode and of the operations of the old company were furnished to Professor Ulrich in 1874 by 
Mr. H. .1. Cope,* and will be read with interest by miners of the present day : — 

" The reef was discovered in 1864 by a Victorian quartz-miner, and is the one first opened 
in the province. It consists of a clayey mica-schist mullock, enclosing veins and bunches 
of quartz. Besides being worked for a good length from the surface, a shaft was sunk on it 
to a depth of 120 ft., from which it was worked out from 90 ft. down, up to the surface, and 
70 ft. in length. There was not much water coming in at the bottom of this deep shaft. 
Another shaft was sunk on the reef at the south-east end of the open workings, about 40 ft. 
deep, and it was followed from this for 80 ft. in length. 

" In the main workings it was at first taken out from 1 ft. to 4 ft. in width, but another 
manager subsequently broke into what has been considered the foot-wall, and worked several 
feet of it, which paid nearly as well as what had been previously taken. A leader was found 
joining the reef which also contained good gold. The yields from the crushings ranged at 
first from ^ oz to 1 1 oz. of gold per ton — average about 1 oz. — but gradually fell off to ^ oz., 
which would not pay at the time, and the mine was therefore given up. The gold was 



* " Report on the Geology and Goldfields of Otago," F. W. Button and G. H. F. Ulrich, 1876, p. 221. 

6* — Queenstown. 



84 

nowhere completely lost in the workings ; but the best seemed to occur in a shoot dipping 
westward in strike. 

" The company had a small battery of five heads of stamps, mth a common amalgamating- 
table and blanket-strakes in front, the whole poorly constructed. Much difficulty was 
experienced in clearing the boxes on account of the mullock being of a very clayey 
nature, and all accounts agree that a great deal of the fine gold was lost. The 
management was altogether very bad, for it took about twenty men to keep the small 
battery going. 

" The shares of the company were at one time at a very high premium, and the coming- 
to-grief of the mine subsequently has been the principal cause of destroying confidence in 
quartz-mining in the district, and that prevented the latter from being properly prospected 
since. Considering all the different points relating to the auriferous character of the reef, 
the workings, management, &c., in concluding, I cannot help coming to the conclusion that 
the reef certainly deserves another trial, and that this, if effected in an economic and 
systematic manner, and with the use of good machinery, might likely prove a very profit- 
able speculation." 

Cornish Lode. — This outcrops on the edge of the Crowm Terrace, about a mile eastward 
of ArrowtowTi. It is a well-defined lode, varving from 2 ft. to 5 ft. wide. The lode-matter 
consists of crushed schist and irregular veins of compact, bluish-grey, pyritic quartz. The course 
of the lode appears to be 335° (true), and the dip south-west at an angle of 85°. Intermittent 
attempts to work this lode have been made at various times during the past thirty years, 
but without success. 

Columbia Lode. — This occurs about 20 chains higher up the gully, near the top of the 
Crown Terrace. Its strike is about 340° (true), and it stands practically vertical. It varies 
from 6 ft. to 8 ft. wide, consisting mainly of quartz in which gold can be seen in places. In 
the early seventies it was opened up along the outcrop by a trench^nearly 40 ft. long, but no 
payable stone was disclosed. 

BuUendcde Lodes,i^ 

Achilles Mine {Old Phcenix). — This mine is situated some seven miles from Skipper's Point. 
At the time of the geological survey of the district no work was being carried on at the mine, 
and, as the old workings and incline shaft were full of water and inaccessible, no information 
as to the lodes or methods of working could be gathered by personal examination. 

For the following particulars concerning the mine and gold-returns the author is indebted 
to an article on " Quartz-mining," contributed to the " New Zealand Mining Handbook." 
1906 :— 

" The Phoenix Mine was originally prospected about the year 1862, when it was purchased 
by Messrs. BuUen Bros., who are said to have expended £50,000 in developing the property. 
During the early stages of development some good returns were obtained, but the work under- 
taken was mainly of a prospecting and opening-up nature, and the mine did not become a 
paying concern until about the year 1884. It was recorded that from February, 1884, to Novem- 
ber, 1885, 6,400 oz. of gold was taken from the mine, the total yield up to 1887 being about 
15,500 oz. In 1888 a poor block of stone was being worked, the yield being as low as 3 dwt. 
per ton, and this continued during 1889, when the owners purchased the Phoenix Extended. 
In 1891, 4,835 tons of quartz was crushed for a return of 3,197 oz. of gold. The property 
was floated on the London market in 1892, and the new proprietary took possession on the 
31st March, 1893. During 1892, 5,457 tons yielded 1,920 oz. of gold f all^the quartz was 
taken from the Phoenix Extended'section. 

" Operations were continued by the new company, called the ' Achilles Gold- mining 
Company,' and good returns were obtained from time to time. In 1896 the quartz in the 



85 

lode then being worked averaged H oz. to the ton, and since the date of registration, in 1893, 
7,181 oz. of gold has been produced, valued at £27,500. The mine continued to be worked 
until 1901, but not with the success attending its former operations. Owing to the capital 
of the company being then exhausted, and no payable stone in sight, the mine was permanently 
closed down in May, 1901. 

" The property was purchased in 190.3 by the Mount Aurum Gold-mining Companv, and 
operations were resumed in 1904 on the British-American line of reef. An aerial tramway 
connects the mine with the battery. ^ The deep workings have not been un watered." • ^ 

Mr. Henry A. Gordon, F.6.S., in his annual report to the Mines Department for 1896, 
writes as follows : — 

" Achilles Mine (Area, 125 acres). — This mine is situated at Bullendale, near the head of 
Skipper's Creek, on the western slopes of Mount Aurum, from which emerge the richest gold- 
bearing streams in New Zealand. From the bottom of the shaft, which is 150 ft. deep, starts 
No. 2 level, with which the lower levels are connected by a perfectly true grade. Up this 
grade the (juartz is hauled in tnicks by an engine worked [by compressed air, the trucks 
containing 5 cwt. each, and is sent to the surface, where it is emptied into self-delivering 
paddocks, whence it goes in trucks holding 25 cwt. to the battery, where all the fine stuff is 
sifted out on grizzlies, the coarse lumps being reduced by rock-l)reakers ; thence it passes into 
automatic feeders, which pay the quartz, now reduced to a uniform size, into the mortar- 
boxes. The automatic feeders have now been in use for twenty-five years, and have given 
perfect satisfaction. Thus the quartz is conveyed from the face of the mine where it was 
first broken out to the battery without being handled oftener than at the initial filling ijito 
the first trucks. i 

" At No. 2 level the Unes of lodes have converged so nmch that they are only 105 ft. apart, 
so that the work of looking for any missing portion is reduced to one-half of what it was at the 
low-level adit, 120 ft. above No. 2 level. Now, to carry out the argument : At No. 4 level, 
184 ft. below No. 2 level, the distance is only 68 ft. between the converging lodes, and in place 
of the middle lode, which has so far not been located at this level, there is a body of phyllitic 
rock that carries payable gold for a distance that has not yet been correctly defined. If the 
three lines of lodes continue to converge at the same ratio they will unite at a level about 
90 ft. below No. 5 level. 

" The present exploitations in the Achilles Mine are chiefly confined to No. 5 level, and are 
of so encouraging a nature that the chief energiesi of the management and plant are directed 
to their development. As stated, this level has reached the depth of 1,200 ft. below the highest 
outcrop of the lode on the hill sideling above it. It is connected by two winzes 160 ft. apart 
with No. 2 level, which in its turn is connected with the surface by the present vertical working- 
shaft 150 ft. deep. A grade already spoken of leads down from No. 2 to No. 5 level, and is 
fitted with a double line of rails for the ascending and descending trucks. These connections 
provide the most perfect ventilation that could be desired, as well as all the other necessary 
conveniences of access, so that it may be pronounced to be in full working-order. The two 
winzes are in course of being connected. The stone now being attacked had a width of 7 ft. 
at No. 4 level ; but at a depth of 83 ft. — that is, at No. 5 level — it had widened out to 13 ft., 
the whole of which is sent to the mill. The new shaft, when completed, will be 600 ft. deep 
from the surface to the bottom of the mine, and will give every convenience in the future 
working of the mine. It will be 12 ft. by 4 ft., divided into three compartments of 4 ft. by 
4 ft. each in the clear. 

" The Achilles stone has been pretty free from pyrites so far, but as greater depths are 
reached they are increasing in quantity, and may be found to be impregnated with gold when 
still greater depths are reached. The now race from the left-hand branch of Skipper's Creek 
will give 400 ft. of pressure, and will be applied directly, instead of employing it for the purpose 



86 

of generating eJectric power, as is done at present. The new race is nearing completion, and 
is expected to be available for motive power before winter. It will have the effect of very 
considerably reducing the working-expenses, and will insure a greater degree of efficiency in the 
work done. The race will be applied to a Pelton wheel, and the present air-compressor at 
the shaft may be done away with. Hauling and piuuping will then be directly done from 
the mouth of the shaft. The electric power will be held in reserve for the extremes of weather 
and other emergencies. The Achilles Goldiields Company was registered in 1893, and up to 
the present date 7,181 oz. of gold has been produced, valued at £27,500. Out of the time 
of its existence there must be deducted eight months during w^hich repairs were carried on. 
During the year 5,453 tons of stone was crushed, giving a return by amalgamation of 4,413 oz. 
Seventy men were employed." 

Skipper^s Point and Shotover Lodes. 

Shotover Consolidated Mine. — This is the only mine at which active operations are 
being carried on at the present time in the Skipper's district. It was first opened about 1867 
by the Nugget Company, and worked without much success until 1884, when it was let on 
tribute. For some twelve years afterwards the ground was owned and worked by the Gallant 
Tipperarv Company, which went into liquidation, the property being sold to the Shotover 
Quartz-mining Company (No Liability), which commenced operations on the 1st January, 
1898. In 1906 the mine was assigned to the present company, which has met with a fair 
amomit of success. 

In the first twenty-five years gold to the value of £48,000 was obtained from ore won 
in various parts of the property, being at the rate of 13 dwt. per ton. 

The mine is situated on the west bank of the Shotover River, about two miles from 
Skipper's Point. It is traversed by two main lodes, locally known as the Eastern and 
Western lodes respectively. 

The Eastern lode crops out about 2 chains below the junction of Nugget Creek, and can 
be traced along the surface for a distance of some 1,900 ft. to a point where it joins the Western 
lode. Its course is 325° (true), and it dips south-west at an angle of 68°. 

The lode-matter varies from 15 ft. to 70 ft. wide, and consists mainly of crushed mica- 
schist traversed by veins of quartz, which open out in places to more or less lenticular masses. 
The quartz lenses are not often met with, only four ha%ang been found at the machine level 
in a distance of 1,900 ft. of dri\ing. 

The first lens occurs about 700 ft. from the mouth of the level ; the second at 1,100 ft. ; 
the third at 1,380 ft. ; and the fourth at 1,640 ft. 

The first lens was 20 ft. long and 12 ft. high ; the second 40 ft. long and about the same 
in height ; and the third about 70 ft. long, 170 ft. high, and from ft. to 15 ft. ^vide ; and 
the fourth, which is being worked at the present time, 25 ft. long, about 50 ft. high, and 25 ft. 
wide. The third lens yielded gold to the value of some £7,000. Up to the end of May, 1908, 
992 tons of ore from the fourth lens yielded 319 oz. 18 dwt. 6 gr. of gold. 

At the time of the author's visit, a distance of 250 ft. had been driven beyond the fourth 
lens without finding another body of quartz. But the existence of four lenses at the machine 
level warrants the belief that other ore-bodies will be found, not only further ahead, but also 
underfoot. 

The lode was worked along the outcrop by an old company in the seventies, with a fair 
measure of success. 

The Western lode crops out at the level of the Shotover, some 215 ft. further down the 
bank. It strikes 336° (true), and dips south-west at angles varying from 65° to 70°. The 
lode-matter consists of crushed and silicified schist, intersected with veins of solid bluish-grey 
quartz. 



87 

The lode can be traced on the surface in a westerly direction from the bank of the 
Shotover to its junction with the Eastern lode, a distance of 1,900 ft. Beyond the 
junction, the united lodes, following the course of the Eastern lode, which is the stronger of 
the two, are traceable a further distance of 1,800 ft. up to the boundary of the company's 
lease, and even beyond that, over the crest of the ridge overlooking Skipper's Creek. The 
work on this lode consists mostly of surface levels and stopes, the work of former owners 
of the ground. 

Going south-eastward, both the Eastern and Western lodes can be traced for a 
considerable distance up the flank of the range, up to a point near the sources of 
Deadman Gully. 

For much of the information recorded above, the author is indebted to the courtesy of 
Mr. T. Otto Bishop, A.O.S.M., the mine-manager. 

Mr. D. B. Waters, A.O.S.M., consulting engineer to the company, has kindly placed at 
my disposal the following interesting excerpts from a report he furnished on the mine in 1906, 
dealing chiefly with the operations of the Shotover Quartz-mining Company, the former 
owners : — 

" The mine has been in existence for thirty years, the different sections being held by 
different parties, ultimately, however, becoming amalgamated and known as the 'Gallant 
Tipperary Mine.' , 

" The Gallant Tipperary Company carried on operations for many years, driving the 
main and intermediate levels, and stoping the ore openi'd up above these levels. This com- 
pany had practically worked out all the ore opened up, and were driving the intermediate 
level ahead, when operations were stopped owing to the closing of the Colonial Bank, which 
had advanced some money to the company. The property, consisting of claim, battery, 
and water-rights, thus fell into the hands of the Colonial Bank, was put up to auction, and 
bought in by some of the old Gallant Tipperary shareholders. 

" These shareholders eventually decided to form a new company, to be known as the 
' Shotover Quartz-mining Company (No Liability).' This company was formed in March, 
1898, with a nominal capital of £6,0(K), in 24,000 shares of 5s. each. Out of these shares, 
12,(K)0 shares paid uj) to 2s. 6d. per share, re])res('nting a value of £1,;')(K), were allotted to the 
vendors to recoup them for purchase of the property from the Colonial Bank, and other 
expenses incurred, and as full payment for the claim, rights, and plant. The remaining 12,000 
shares were issued to the public, and were fully applied for, the vendors themselves taking 
6,700 .shares. 

" This flotation thus gave the company the sum of £4,500 as a working capital, the whole 
of which was eventually obtained by calls, no shares being forfeited. 

" From the time the Colonial Bank took over the mine, and operations ceased, some 
two years elapsed before the new owners started operations again. During that time much 
of the main level fell in, rendering a considerable expenditure necessary to reopen the 
old mine. After due consideration the new owners decided to open up the mine 
afresh at a lower level, so as to tap the ore previously worked lower down. To 
do this it was decided to drive what is known as the ' machine level,' this level starting 
277 ft. lower than the main level, and, as shown, just level with the roof of the battery- 
house. 

" The reef-formation in which the ore-bodies occur crosses the Shotover River nearly at 
right angles, running N. 40° W., with a dip of 70° to the south-west. Hence it will be seen 
that all the levels are driven on the reef-formation, and are continually prospecting the lode- 
formation. 

" When the Shotover Company started operations it was expected, from surface indica- 
tions, that a considerable amount of barren ground would have to be passed through — in fact, 



88 



that 1,000 ft. to 1,200 ft. at least would liave to be driven before any ore could be expected 
in bulk. 

" The driving of the machine level was started in March, 1898, and steadily prosecuted. 
Afterjdriving about 750 ft. a small block of gold-bearing ore gave 34 oz. of gold from 108 
tons. Driving was continued, and after two years of steady work with four men a distance 
of 1,020 ft. was reached, whilst prospecting rises and crosscuts amounted to 256 ft. more. 
The level was timbered throughout, and always kept in good repair, the work being done 
at an average cost of £1 15s. per foot. 

"Driving was still continued, and between 1,100ft. and 1,200ft. another small block 
of ore was struck, which only yielded 280 tons of ore, from which 101 oz. of gold was obtained. 

" When the level reached 1,316 ft. a much larger block was struck, which continued for a dis- 
tance of 70 ft., and from this block a considerable amount of ore has now been mined. This 
block has gone up a distance of some 200 ft. above the level, but after a height of about 150 ft. 
was reached the value of the stone became much poorer. 

" The machine level was continued some little distance further — to 1,450 ft. — at which 
point it now stands (1906). 

" The mine is equipped with a 10-head stamper-battery, which"^ was' erected at a cost 
of £950 in 1903, and, so far as crushing and amalgamating is concerned, it has given every 
satisfaction. 

" Besides this, expenditure was incurred in connection with the water-races and in erection 
of a small cyanide plant, &c., as shown hereafter under details of expenditure. 

' The following table shows revenue up to the 15th October, 1905 : — 

Cash from first issue of shares . . 
Cash from second issue of shares 
Debenture-issue 
Bullion sold T. .' 
Rent of water 



" From the 15th October up to the 31st December, 1905, the amount of gold obtained 
had a value of £70 2s. 7d., giving a total revenue to the 31st December, 1905, of £14,370 
12s. Id. 

" Summary. — The Shotover Quartz-mining Company spent a total sum of £14,775 17s. 9d. 
up to the 31st December, 1905, whilst the revenue from all sources amounted to £14,370 12s. Id. 
The expenditure is as follows : — 



£ 


s. 


d. 


4,500 








1,245 








750~ 








7,443 


1 


2 


r 362 


8 


4 


14,300 


9 


6 



Capital expenditure at mine 
Office expenses 
Mining and milling 



£ s. 


d. 


5,726 18 


2 


1,664 11 


7 


7,384 8 






14,775 17 9 



" Gold to the value of £7,513 3s. 9d. was won from about 5,000 tons of ore." 

Peafs Lode. — This lode crops out on the north side of the Shotover, on the steep face 

overlooking the river, at a point about a mile from the Shotover Consolidated Mine. It strikes 

75° (true), and dips southward at an angle of 60°. 

The outcrop has been prospected for a considerable length by shallow holes and open 

cuts or trenches. In these workings the lode-matter is seen to consist of crushed mica-schist 

veined with small strings of rusty-coloured quartz, in which colours of gold are seen in places. 



89 

At one point a prospecting-liole has been sunk to a depth of 9 ft., and in this case the 
cross-section of the lode is as shown in the next figure : — 




Fig. l';J. ( 'Ro.ss-sKrTn)N of 1*kat"s Lodk, in PuusriciTiNii-iioi-K, Shdtovkk Hivkk. 
a. Mica-schist. b. Quartz voiiLs. c. Cnislicd schist. 



The hanging-wall is smooth and often slickensided. The foot-wall is not so c^learly 
defined, and is not quite parallel to the opposite wall. 

The veins of quartz in the main prospecting-hole are small, being not often over a few 
inches thick. As shown in Fig. 23, the foot-wall vein is the largest, and it is said to be the 
richest. 

Some 10 ft. south of the prospecting-hole, in the first trench going westward on the course 
of the lode, the quartz veins widen out to \2 in. or 16 in., the crushed and broken schist having 
decreased proportionately. 

In the next cutting going westward, some 20 ft. distant from the last, the lode is bent 
over and crushed along the outcrop, the curvature having been caused by the pressure of the 
ice-sheet that .sculptured the adjacent slop«'s in the glacial period. In this cutting the width 
of the lode is some 6 ft., most of the solid quartz being confined to the hanging-wall side, where 
it shows, on the north face, a thickness of 20 in. 

It is the intention of the owners of the ground U) prospect the lode further by driving a 
crosscut from the slope below in such a position as to give about 80 ft. of backs on the lode 
where it is intersected. The outcroj) pro.spects seem to warrant the cost of such an under- 
taking. The lode is situated in such a way with respect to the surface-contours that its 
development could be carried on by a moderate outlay of capital should the prospects found 
at the proposed level justify such a ccjurse. 

Junction Lode No. 1. — At a point about 40 chains from the Shotover junction there 
crops out on both sides of Skipper's Creek a strong quartz lode that strikes a little to the 
east of north, and dips easterly at angles varying from 70° to 80°. It varies from 2 in. to 
24 in. wide, as seen along the outcrop, and can be traced in a northerly direction along 
the steep slopes of the ridge on the north side of Skipper's Creek for a distance of 15 chains, 
and in a southerly direction towards Stevenson's Claim, at Skipper's Point, for some 5 chains. 

Some 20 yards below the bridle-track leading to the Shotover Consolidated Mine the 
lode throws oft a branch to the westward. This branch vein strikes 332° (true), and stands 
nearly vertical. It varies from 2 in. to 12 in. thick, and lies between well-defined walls. 

The main lode consists of hard grey quartz, with a shining vitreous lustre, that encloses 
irregular masses of broken silicified schist. The ore, so far as can be judged by an examination 



90 

of the surface outcrop, is comjiaratively free from metallic suljliicles. The walls are every 
where sharply defined, and in a few places exhibit smooth slickensided faces. 




Fig. 24. Diagrammatic Section showing Relationship of Junction Lodes, Skipper's Point. 
A. Main lode. B. Branch vein. C. Second branch vein. 



About 35 ft. west of the main lode, at the level of the track, there is another outcrop 
of quartz, marked C in Fig. 24. It varies from 2 in. to 16 in. thick, and consists of bluish-grey 
quartz. Its relationship to the main lode cannot be determined, on account of the covering 
of slope-debris, but it seems not improbable that it will unite with the main lode in depth, as 
also will the branch vein marked B. 

The enclosing country rock is a crumbling silvery-grey mica-schist, consisting of thin 
laminae of quartz and micaceous matter. It strikes a little to the east of north, and dips 
westerly at angles between 12° and 20°. On the hanging- wall side of the main lode, and 
some 100 ft. above it in stratigraphical position, the mica-schist is intercalated with a dis- 
tinct bed of chloritic mica-schist about 12 ft. thick. 

A sample of ore selected from the outcrop of the main lode, at the point where it crosses 
the bridle-track, showed on assay a value of 2 dwt. 12 gr. per ton. 

Junction Lode No. 2. — This lode crops out about 3 chains east of No. 1- — that is, it lies 
between No. 1 lode and the mouth of Skipper's Creek. It crosses Skipper's Creek, and can 
be seen on both banks as a strong well-define'd body of ore. Its strike varies from 345° to 
350° (true), and it stands vertical or bends in a peculiar way to the westward. Going south- 
ward it passes into Stevenson's alluvial claim. 

The lode-matter consists of compact, grey, crystalline quartz, varying from 8 in. to 30 in. 
wide, and lenticular masses of hard brecciated mica-schist. The form of the outcrop, as 
exposed in the steep face 50 ft. above the tracK is shown in Fig. 25. 




Fig. 25. Cross-section of Junction Lode No. 2, near Mouth of Skipper's Creek, Shotovkh. 
3. Mica-schist. b. Junction lode No. 2. 



91 

The outcrop of the lode can be traced northward for a distance of 10 chains. 

The lode is enclosed between well-defined walls, and is found to vary in width from 8 in. 

to 7 ft. The structure of the lode-matter and its arrangement at the widest part of the lens, 

as shown in Fig. 25, is represented iu Fig. 26. 




CUV 



Fig. 26. Knlarued Sectional Vikw of JuNtxioN Lode No. 2, Skipper's Point, Shotover. 
a. Vein of quartz, 1 in. to 4 in. 6. (.'rack triiveitiinn lode. c. Brecciated mica-schist. 



d. Contorted mica -schist. 



an. Foot- wall lens of quartz. 



Samples of quartz selected from the hanging-wall and foot-wall veins showed gold at 
the rate of 1 dwt. 18 gr. and 2 dwt. 6 gr. per ton respectively. 

The relationship of Junction No. 1 to .Junction No. 2 lode is .shown in the next figure. 




Fio. 27. Section showing Relationship of Junction Lodes Nos. 1 and 2. 
a. Mica-schist. 6. Chloritic mica-schist. c. Junction lode No. \. d. Junction lode No. 2. 



A. Skipper's Creek. 



The Bridge Lode. — This lode crops out on the north bank of Skipper's Creek, about 
50 yards above the foot-bridge on the Shotover bridle-track, and 100 yards above 
the mouth of Jennings Creek. It strikes 335° (true), and dips north-east at an angle 
of 45°. The enclosing rock is a crumbling silvery-grey mica-schist that strikes 17° (true), 
and dips westerly at an angle of 30°. The lode varies from 2 in. to 16 in. wide. It 



92 

is well seen on the flat, shelving, schist ledge on the bank of the stream, where it forms 
a flat lens of quartz 20 ft. long, tapering from 2in. at the end to 16 in. at the widest part. 
(See Plate XXXVII.) 

The lode- matter consists of hard, grey, crystalline quartz, containing a little pyrites. A 
sample of the ore selected from the outcrop of the lens showed by fire assay a return of 2 dwt. 
18 gr. of gold per ton. 

On the hanging-wall, and 25 ft. distant, there is a small parallel vein of quartz a few 
inches wide. 

The plan and cross-section of this interesting lode are shown in Plate XXXVI, facing 
this page. 

A sample of ore selected from the outcrop of the truncated lens exposed on the bank of 
the stream gave a return of 2 dwt. 18 gr. of gold per ton. 

Lodes in Stevenson's Claim, Skipper^s Point. — The sluicing-away of the terrace-gravels 
at Skipper's Point has uncovered several lodes on the platform that formed the channel of 
the Shotover in the glacial period. This old river- and glacier-channel lies 200 ft. above the 
present surface of the Shotover River, and is composed of a weak friable mica-schist inter- 
calated with thin beds of chloritic mica-schist. 

On the main floor there is exposed a broad platform of the bed-rock, some 2 acres in extent, 
and on this the upturned edges of the schist are beautifully exposed to view. By running 
the eye along any distinctive bed it is seen at once that the strike is not straight or uniform, 
but varies from 171° to 182°(true) at different points. The direction of the dip is westward, 
the mean angle of inclination being about 35°. 

The apex of the ridge of rock lying between the two main glacial channels of the Shotover 
is traversed by a number of quartz veins, some of which are large w^ell-defined bodies of stone, 
while others are irregular and small. 

No. 1 lode crops out on the west side of the big platform, in an old tail-race. Its 
course is 178° (true), and it stands practically vertical at its northern end, but going 
southward it is seen to bend towards the south-east — that is, 160° (true). From the point 
where it changes its course it dips towards the north-east at an angle of 55°. 

The lode-material consists of compact greyish-white quartz, varying from 2 in. to 2 ft. 
wide. 

The plan of this lode, with its numerous hanging-wall branch veins, as seen on the floor 
of the bare rock platform, is shown in Fig. 28. 




Fig. 28. Plan showing No. 1 Lode and its Branch Veins, Stevenson's Claim, Skipper's Point. 



No. 2 lode is exposed on the floor and sides of the smaller and more easterly glacial channel 
of the Shotover. It consists of compact quartz, and is little better than a veinlet, varying 
from 1 in. to 4 in. wide. It strikes 148° (true), and dips north-east at an angle of 36°. On 



PI, All-: XXXVI. 



SECTION ON LINE AB 



1 , . 


5 


O 


10 

1 








1 




V\..\y .\Nu Cuoss-SECTiox OF Tin; IhuDCK I.ODK, Skii'I'kh's Ckkkk. 



liulhtin Xo. 7.] 



[To face ji. 02. 



PI.ATE XXXVII. 







Lens of (^)uai!Tz ix A'ein on Bank of Skippek's Ckeek, 50 Yards above FooTm!iD«E. 

I'hoio Jaiiii-i I'aik.] 



93 

the north wall of the channel it is seen to be slightly displaced by a small fault, as shown in 
the next figure : — 




Fio. 29. Cross-section of No. 2 Lode, Stevenson's Claim, Skipper's Point. 
a. Mica-schist. b. No. 2 lode. c. Fault. 

No. 3 lode crops out near the lower end of the same rock-channel, which presents the 
appearance of a deep, well-e.\cavatod, railway rock-cutting. It is best exposed on the west 
side of an old tail-race. Its strike is 360° (true), and it dips east — that is, towards the Shot- 
over River — at an angle of 35°. 

The lode-matter varies from- 4 in. to 4 ft. wide, and consists mainly of distinct bands of 
rusty-coloured quartz and broken .schist, recemented into a solid mass. 

The lode can be traced along the floor of the claim for a distance of 3 chains. It is a 
strong well-defined lode, and has probably some relation to one of the Junction lodes that 
crop out on the banks of Skipper's Creek near-by. 

' No. 4 lode crops out about 50 ft. west of No. 3. It strikes 170° (true), and stands vertical. 

It varies from 4 ft. to 8 ft. wide, and consists of broken schist intersected with quartz 
veins that are rarely well defined. In some respects it resembles a zone of mineralised rock 
rather than a lode. 

- ' A sample of quartz selected at the outcrop was found by fire assay to contain 2 dwt. 6 gr. 
of gold to the ton. 

■ ■ ' ;No. 5 lode is a strong well-defined body of ore that unites with No. 4 lode at the north 
end of the trench. It consists of nisty-colourcd (juartz, varying from 6 in. to 4 ft. wide. Its 
strike is 192° (true), and for the first 55 ft. it stands nearly vertical, but thereafter it inclines 
to the eastward at an angle of 40°, sending off a branch vein that dips towards the east. 

A sample of ore selected along the outcrop was found by fire assay to contain gold at the 
rate of 1 dwt. 18 gr. per ton. 

The relationship of the last three lodes is represented in Fig. No. 30. 



ms 



N°4 



N^3 




Fio. 30. Cross-section showing Relationship or Stevenson's Lodes Nos. 3, 4, and .5, Skipper's Point, 

Shotover. 



94 

Eurela Lode. — This lode crops out on the south side of Jennings Creek, about a mile 
from the junction of that creek with Skipper's Creek. It strikes 130° (true), and dips to the 
southward at an angle of 50°. The hanging-wall is well defined. The lode-matter, as seen at 
the outcrop, consists of crushed mica-schist and veins of quartz. Most of the quartz exca- 
vated from a surface trench on the outcrop shows shining slickensided surfaces, which tends 
to show that considerable movement has taken place on the walls since the formation of the 
lode. 

Very little of the lode can be seen at the surface, on account of the overburden, but so far 
as could be ascertained the ^vidth between the walls varies from 2 ft. to 4 ft. Several attempts 
have been made to work this lode, but so far without success. 

During the past twenty-five years a considerable amount of attention has been devoted to 
the prospecting of the Le^nathan, Crystal, and Johnston lodes, situated on the ridge between 
Saw3'er's Gully and Jennings Gully, the first two on the Sawyer's Creek fall, the latter on the 
Jeimings Creek side, but so far without success. 

Skipper's Gorge Lode. — This lode crops out in the bottom of Skipper's Gorge, about 
26 chains below the mouth of Butcher's Creek. It varies from a clay parting to 4 ft. wide, 
and consists of crushed mica-schist, and quartz veins that commonly run parallel with 
the walls. 

The lode strikes 320° (true), and dips south-west at angles varying from 62° to 75°. 
The enclosing rock is a soft mica-schist that strikes 355° (true), and dips west at an angle 
of 32°. 

A sample of ore selected from the outcrop on the bank of the creek was found to contain 
gold at the rate of 3 dwt. 6 gr. to the ton. 

SCHEELITE. 

Up to the present time scheelite has not been found in the soft, silky, gold-bearing 
mica-schists of the Wakatipu area, but only in the harder semi-metamorphic schists of the 
upper or Kakanui Series. Thus, while traces are rarely found in the Arrow and Shotover 
rivers, pebbles, and even boulders, of the mineral have been often met with in the gravels 
of Moke Creek and those of the branch streams that traverse the upper schists. 

There is reason to believe that quartz lodes carrying scheelite will be^ foimd between 
Moke Lake and Ben More, between Bob's Cove and Mount Crichton, and on the ranges around 
Lake Luna. 

Copper. 

Moke Creek Copper Lode. — This so-called copper lode, on examination, was found to be a 
narrow zone of mineralised schist which crops out on the banks of Moke Creek, about half a mile 
above the junction of Maconnachie's Creek, at an altitude of 1,560 ft. above sea-level. It 
varies from a few inches to 12 in. wide. The strike of the schist and enclosed copper- bearing 
zone is 355° (true), and the dip west at an angle of about 50°. 

The copper-bearing ore consists of rusty-coloured quartz, in which occur irregular bunches 
and bands of copper and iron pyrites. It is enclosed on the foot- wall by a soft, bluish-grey, 
fissile mica-schist, much crushed and broken in the immediate vicinity of the copper zone, and 
on the hanging-wall by a greenish-grey chloritic schist, somewhat harder than the foot-wall rock. 
On the face of the creek-bank the enclosing schist is slightly stained with copper-carbonates 
for a width of 2 ft. or 3 ft. 

The copper-bearing zone crosses Moke Creek at right angles to its course, and is well 
situated for examination. It has been prospected by two lodes, driven along the course of the 
minerahsed belt, and by a number of shallow trenches and pits. No copper-ore could be 



95 

seen in the face of the levels. Samples can be selected from the surface dumps giving 
from 5 per cent, to 20 per cent, of copper, according to the care devoted to the knapping 
and selection. 




Fio. 31. Cross-section of CuPRiFERons Schists, Moke Creek ; lookivo Northward. 
a and c. Mica-schist. 6. Mineralised zone. 



The copper-bearing band follows the foliation-plane of the schist, and is therefore what in 
Norway would be termed a jaMband. It is too small to be profitably worked at the present 
time. 

Skipper's Point Copper Zone. — This is exposed in the floor of the terrace claims immediately 
below Skipper's Point. It is a mineralised zone of schist, consisting of intensely hard silicified 
chloritic mica-schist, in which there occur lenticular masses of blackish-brown ferro-manganese 
ore associated with epidote, garnet, calcite, rhodonite, copper, and specular iron. The copper 
occurs as incrustations of the green carbonate, and the specular iron as small and large grains 
disseminated throughout the garnet rock. The rhodonite commonly occurs in small irregular 
masses. 

The ferro-manganese ore forms the bulk of the ore known to the alluvial miners as black 
Maori. 

Antimony. 

Advance Peak Lode. — A quartz lode was discovered by a prospector near the head of 
Rodger's (Jully, behind Advance Peak, at an altitude of 4,000 ft. above the sea, that yielded 
some samples of antimonite of good quality. The antimony-ore occurred as an isolated 
bunch at the outcrop. Antimony-ore is notoriously patchy, and there is every reason to 
believe that other bunches of ore %vill be found by driving along the course of the lode. But 
the great altitude, the scarcity of mine-timber, and the inaccessible position will at all 
times greatly militate against successful mininji at this place. 

Skipper s Point Antimony. — A considerable quantity of antimonite, as loose boulders, 
occurs among the alluvial wash in Stevenson's Claim. The ore is often quartzose, but much 
of it is high grade. 

The source of this ore has not yet been found. It is unlikely that it can be far from 
Skipper's Point, as antimonite, being a soft ore, would not be able to withstand the 
pounding to which it would be subjected in the course of a long journey along the bed of a swift 
stream. The antimony-bearing lode will probably be found somewhere on the ridges lying 
between the Shotover and Skipper's Point. 



Alluvial Mining. 

The gold-production of Otago from the year 1857 to the 31st December, 1906, aniounted 
to 676,386 oz., valued at £26,519,060 ; and, of this great output, alluvial mining has produced 



96 

somewhat over £25,000,000, or 98 per cent, of the whole. Of the total gold-production of the 
Dominion, amovmting to a value of £69,501,488, Otago is responsible for no less than 35-5 per 
cent. For some years past Auckland has taken the lead in annual gold-production ; but, even 
if the present rate of production is maintained, it will take that province thirty years to reach 
the total yield of Otago. 

It is satisfactory to note that alluvial inining in Otago still maintains a high place as a 
source of gold, and will doubtless continue to do so for many years to come. 

In the Shotover and Arrow river-systems there are two main sources of alluvial gold — 
namely, (a) river-bed gravels and (6) terrace-gravels. 

Terrace- (jravels. — The most important of these deposits lies between Skipper's Point and 
Maori Point. It has been worked continuously for the past forty years. 

The gravels forming this old gravel wash are composed of schistose material, in which 
occur a few black boulders of hornblende-lamprophyre, derived from dykes intruding the 
schists at the source of the Shotover, and occasional masses of the Tertiary fossiliferous con- 
glomerate involved in the great Moonlight thrust-plane. 

They vary from 150 ft. to 190 ft. thick, and rest in the old glacial channel of the Shotover, 
which lies about 200 ft. above the present level of the river. A reference to the special map 
of Skipper's Point will show the areas of gravel that have been sluiced away and those that 
stiU remain. 

The best of the gold is found at or near the schist-bottom, and in the layers of coarse 
wash that in places occur a few feet or a few yards above the bottom. 

The pay-wash occurs partly in short leads and partly in irregular patches. The richest 
patches have been found in places immediately below the point where the lateral streams 
that descend from the Richardson Mountains enter the Shotover Valley. Among typical 
examples of historic fame occurring in such situations are those at the junctions of Skipper's, 
Sawyer's, Londonderry, Pleasant, and Stony creeks. 

In the pioneer days the gold-wash was driven out by underground mining, but in the 
past two decades large areas of the gravels have been bodily removed by hydraulic sluicing. 
There still remains a considerable area of gold-bearing wash that will continue to furnish gold 
for many years to come. 

The distribution of the gold-wash shows that, while a portion of the gold has been brought 
down by the Shotover, a part, and by far the greater part, has been contributed by the lateral 
creeks. Of these contributory streams Skipper's Creek is the most important. This stream, 
with its numerous branches, follows and deeply dissects the belt of mica-schist that contains 
the greatest number of productive gold-bearing lodes in the district. On the other hand. 
Stony Creek has been less productive, which is doubtless due to the circumstance that 
only in the lower few miles of its course does it pass through the gold-bearing zone of 
schist. 

Isolated patches of high terrace-gravels occur overlooking Butcher's GuUy. The causes 
that have led to the enrichment of the wash at the mouth of Skipper's Creek must have 
operated in the enrichment of these patches, although doubtless in a somewhat less 
degree. 

Monk's Terrace, nearly opposite Sandhills Creek, has proved a profitable source of alluvial 
gold for some years. The gold was probably brought there by the small lateral stream 
immediately above the claim. A search of the watershed of this stream would no doubt 
reveal a gold-bearing lode somewhere in the neighbourhood. 

A high terrace of gold-bearing gravel wash Ues along the bottom of Moonlight Gully, its 
greatest extent lying between the mouth of Moke Creek and Dead Horse Gully. It occupies 
the floor of the MoonUght glacial valley. Enrichment of the wash has taken place at the 
mouth of Moke Creek in the ground worked by the Moonlight HydrauUc Sluicing 



97 

Company, and at the mouth of Dead Horse Gully ; but the enrichment was not com- 
parable with that at Skipper's Point, as Moke Creek and Dead Horse Gully for the 
greater part of their course run outside the gold-bearing zone of mica-schist, which is 
the silvery-grey crumbling mica-schist so well developed at Macetown and Skipper's 
Creek. 

The high glacial terrace on which Macetowm stands contained some rich runs of gold- 
wash, that for the most part owed their origin to the gold carried down by the Goldburn, the 
gold having been derived from the denudation of the lodes of the Tipperary-Premier system 
of reefs. 

Above Macetown the Arrow River runs for the greater part of its course in the unpro- 
ductive zone of country rock underlying the gold-bearing zone, only some of the western 
tributaries that rise on the slopes of .\dvance Peak cutting back far enough to the westward to 
reach the lower edge of the productive mica-schist. 

A portion of the fluvio-glacial drift at the Arrow end of the Crown Terrace has yielded 
rich returns from a short run of gold-wash, the source of which lies in the area between Mount 
Beetham and Bracken's Gully. 

An old fluvio-glacial channel runs along the foot of Coronet Range, from Miller's Flat 
towards Arthur's Point. It probably contains a run of gold-wash, but whether the wash 
is payable and of some exteiit can oidy be determined by boreholes or prospecting- 
.shafts. 

Hirer- and Slream-hed Wash. — The Arrow and Rhotover rivers for countless ages before 
tlie advent of man acted as natural sludge-c^haniK'ls, in which the gold, lii)erated from the 
lodes in the adjacent country by fiuviatile dis.section and glacial erosion throughout a geological 
period, became concentrated in pockets and leads, as it does in the tail-race of the modern 
miner. 

The pioneer miners began operations by cleaning up the beds of the rivers and streams. 
The pav-wash was generally shallow, and often fabulously rich. The country swarmed with 
thousands of enterprising men, and before the close of the .seventies practically all the shallow 
ground was e.xhausted. Sniall areas of deep ground, however, existed in the Arrow Gorge 
and in the Shotover at Arthur's Point, and these yielded rich returns for many years. Among 
the most successful of the dredging-claims taken up in the Shotover was the Sew Hoy Claim, 
on the Big Beach, near Arthur's Point, on which a dredge was erected by a Chinese merchant of 
that name in 1889. 

There is a well-founded belief among the local miners that a large amount of gold still 
lies in the bed of the Shotover. The ground is deep, and the mechanical difficulty of recovering 
the gold is verj' great. With each succe.ssive year the cover of wa.sh is becoming deeper and 
deeper, through the large amount of gravel sluiced into the river at and near Skipper's Point. 
To turn the river is impracticable, and for the present the gold must lie undisturbed. 

Lake Hayes Limestone. 

The high terrace at the south end of Lake Hayes consists of finely bedded silts, or rock-flour, 
occurring in distinct drab- and grey-coloured horizontal lamina>. On examination the grey- 
coloured layers are found to consist of soft incoherent limestone, occurring in excessively fine 
particles. 

Passing eastward from the outlet towards the corner of the lake near Morven Hill, and 
westward toward Messrs. Reid and McDowell's farm, the drab-coloured layers gradually thin 
out in the middle horizon, being replaced by the limestone layers, which widen out at the 
south-east and south-west corners of the lake to deposits of considerable extent and great 
purity. 

7 — QueenstowD, 



98 

The section of the terrace exposed at the south-east corner is shown in Fig. 32 below, and 
in Plate XXXVIII. 





-j--f^:l 




\^ /-_-_ h - 




CoauhiFoqxh \ J-7.~^7._' 




I -^.-L-"--- --•- ■--•--■-•----;- 


Lah£ Hayes 


' %/'-zrs--:<i--''-~- 


Y 


\ ~i~-y*^--^ - : ".'^T^'.zi.' 


1 
1 


I <* l~~^7—.'—.reZ.— - 


A/ ! 


1 1 y ■ — • — _'_~.\T-'-^^'-~' ^ 


M .; 


^-. ■ vjty\'. "• ': ■■.: .■'.■■■.::.■■: y~- ^ 


— _>T-^<^ • • . " ■ 


'■■'■'■'■':'■' ■', •'_•'• '.' -,.\/ .•. .• .* .,',' .' 



Fig. 32. Section showing Depo.sit of Limestone at South-east Corner of Lake Hayes. 

a. Surface soil. h. Lime.stone. c. Drab-foloutP<l silt, from 2 ft. to 3 ft. thick. d. Lime- 

stones, e. Tni))uie limestone. /. Dialj-ooloiired .silt. 



The section exposed in Messrs. Reid and McDowell's limestone-deposit at the south-west 
angle of the lake is shown in the next figure : — 




Lah£ Hayes 



Fig. 33. Section showtnq Face of Reid and McDowell's Limestone-deposit at South-west Angle of 

Lake Hayes. 

a. Surface soil, 2 ft. 3 in. thick. h. Limestone, 4 ft. thick. c. Drab-coloured silt, 6 in. to 12 in. 

thick. d. Limestone, 6 ft. thick. e. Impure limestone, drab-coloured. 



This limestone is a fresh - water deposit that was formed in still water. It was 
no doubt precipitated from the Avaters of the lake by the action of mosses and fresh- 
water algae. 

The material is excessively fine in texture, and so soft as to be easily excavated with a 
spade without exerting much force. Its purity and pulverulent form render it of great 
economic value for agricultural purposes, both for dressing the land and in the manufacture 
of manures. Already several hundreds of tons of it have been bagged and forwarded to 
Southland. 

The extent of the deposits at the places described above is not kno^Ti, and 
can only be determined by boring or sinking shafts on the terrace. If the thickness 



IM.ATI-. \XX^•1II. 




l^LAUKV ui (. Ai.i .\i;i:()Ls ()u/-i; ( Limkstoxk), South-kast l'.\i> ui )-.\ki; IIayk 

I'liiitii Jdiiirs I'aih. ' 



Ihilhlin X;. ;.] 



[To fan- p. .%'. 



99 

as exposed in the present working-faces be maintained, it is estimated that each acre 
should contain some 12,000 or 15,000 tons of limestone of marketable quality, and 
10,000 tons of impure limestone suitable for top-dressing agricultural and pastoral lands 
tliat are deficient in lime. 

The results of the analyses of samples of the pure and impure limestone made by Dr. J. S. 
Maclaurin, D.Sc, F.C.S., Dominion Analyst, are given below in tabulated form : — 





1. 


2. 


3. 


4. 


.5. 


Silica 


7-15 


41-90 


10-78 


6-30 


10-54 


Alumina 


3-24 


18-50 


5-12 


2-61 


4-28 


Ferric oxide . . 


2-00 


7-68 


2-40 


1-76 


2-12 


Manganous oxide 


0-07 


0-25 


0-05 


0-05 


0-12 


Lime . . 


47-70 


12-52 


44-25 


48-44 


45-30 


Magnesia 


0-20 


2-57 


0-40 


0-25 


0-30 


Carbonic anhydride 


.36-90 


8-32 


34-43 


37-85 


34-80 


Moisture and organic mattci- 


1-77 


3-72 


103 


1-57 


1-61 


Undetermined . . 


0-97 


4-54 


1-54 


1-17 


0-93 



Equivalent to calcium-carbonate 



100-00 10000 100-00 100-00 100-00 
83-86 18-91 79-16 86-02 79-15 



1. Top liiyor, south-oast, side of Reui and MrDowell's (|unrrv. 

2. Grey band (middle layer). 

3. T^wer band, 6 ft. 

4. Impure limestone at base. 

r>. Average sample of whole f»co. 



Bob's Cove Limestone. 

The middle member of the Tertiary Series at this place consists of some 75 ft. of limestone, 
of which there is a band of great purity and extent 50 ft. thick. This bed of limestone can be 
traced along the surface for a distance of 40 chains. It rises from the level of the lake to a 
height of over 1,600 ft. above the sea, and is exposed in such a manner as to offer greal 
facilities for easy and economical working (see Fig. 17). The (juantity that could be 
excavated above water-level, without the removal of much overburden, amounts to over 
2,500,000 tons. 

The limestone is close in texture, semi-crystalline in structure, and very hard. The 
colour is a pale-yellowish grey to drab. A sample analysed by Mr. 0. M. Thomson, F.L.8., 
gave the following results : — 



Calcium-carbonate . . 
Alumina and iron-oxide 
Silica and insoluble matter 

Total .. 



92-42 
3-60 
4 03 

10005 



This limestone is suitable for burning for lime for mortar and agricultural purposes, and 
for the manufacture of cement. It possesses all the characteristics of a first-class building- 
stone, including strength, durability, and good colour, and, having a fine texture, it is easily 
worked, and takes a fine polish. 



100 

Bob's Cove Marl. 

This forms one of the lowest members of the Tertiary Series. It is several hundreds of 
feet thick, and is simply a hardened sea-mud, having the following composition : — 



Analysis by Mr. G. M 


. Thcmson, F.L.S. 


\ 


Calcium -carbonate . . 


. . 34-52 


Calcium-oxide (otherwise combined) 




2-39 


Alumina and oxide of iron 




6-50 


Magnesia . . 




0-72 


Silica and insoluble matter 




.. 51-60 


AlkaUs and loss 




2-51 


Moisture 




1-76 



Total 



100-00 



The marl and limestone are admirably adapted for the manufacture of cement. Both- 
occur close to deep water, both exist in immense quantity, and there is a sufficient supplv 
of water in the Twelve-mile Creek near-by to provide all the motive power required in the 
manufacture. The only disability that exists is the absence of a known coal-deposit in the 
vicinity. 

Given a supply of cheap coal, there is no place in New Zealand where a high-class 
sement could be manufactured to better advantage, barring the freight-charges on the manu- 
factured article to the market. But, despite these, a flourishing industr}- might easily be 
established if cheap fuel could be procured. 



Coal. 

The only place in the Wakatipu district at which there is a hkelihood of finding coal is 
at Bob's Cove, where there is a patch of the Tertiary brown-coal measures of Otago and 
Southland. 

Some years ago a borehole was put down close to the edge of the lake, at a place a few 
chains east of the limestone outcrop. The borehole was vertical, and its site was not selected 
with much care or regard for the disposition of the strata. 

At the borehole the dip of the beds is about 55°, and, considering the great thickness of 
the marly clays underlying the sandstone in ^\•hich the hole began, it is obvious that the depth 
to be bored to reach the coal-horizon, which in its turn underlies the marly clays, would pro- 
bably not be less than 800 ft. 

The most promising site for boring is situated at the back of the limestone ridge, in the 
small swampy bight near the foot of the escarpment that faces the flat along which the road 
passes to Bob's Cove. On account of the high angle at which the beds are inclined, it would 
be advisable to put the borehole down at an angle of 30° or 40° from the horizon, in a northerly 
direction. If coal exists at all in the measures at Bob's Cove, it will be imder the fiat spoken 
of above. 

A thin streak of coal about 2 in. thick occurs in the wedge of Tertiaries involved in the 
schist in SefFer's Creek, which falls into Moke Creek a mile or less below the outlet of Moke 
Lake ; but it is of no value, and gives promise of nothing better. 

The discovery of coal at Bob's Cove would be of great importance to Queenstown and 
Wakatipu district, and is a matter that should not be lost sight of. The presence of the 
coal-measures is no guarantee that workable coal will be found, but the prospects are not 
unfavourable. 



101 

Building-stones. 

Altered Greyuacle. — The , serai-metamorphic schists and altered greywacke found at 
Lake Dispute, and fornung Walter and Cecil mountains, are strong compact building-stones 
of good colour, that could be easily hewn into market sizes and shapes. 

A good quarry could be opened at the upper end of Lake Dispute, or on the shores of 
Lake Wakatipu opposite Queenstown. 

The Lake Dispute stone is of superior quality, and could be obtained in large blocks at a 
comparatively small cost. The distance from the quarry to the shore of Lake Wakatipu 
would be about two miles of down grade, on which a self-acting aerial tramway would work 
with ease. 

Bob's Cove Sandstone. — This is a yellowish-brown sandstone of even grain, and a hardness 
somewhat above that of English freestones. It is a superior l>uilding-stone, that is easy to 
quarry and dress by hand-labour. 

A quarry could be opened at a point a few chains from the shore of the lake. If this 
stone could be placed on the market at a reasonable price, it would be certain to command a 
ready sale. 

Bob's Cove Limestone. — This is a stone of superior (juality for l)uilding purposes. It is 
dense, homogeneous, strong, of good colour, and easily worked. A quarry could be opened 
quite close to the shore of the lake. 



103 



INDEX 



A. 



Aberrant form of Fagti-i fiixca 

" Acherou " (ship) 

Achilles Mine . . . . . . 84 

Acknowledgments 
Actinolite 

,, -schist 
Adams, Professor F. D.. McGill I'nivei-sity 
Advance Peak, . . . . 3, 9, 20. 76, 70 

,, line of reef 

,, lode 

Aerial tramways, facilities for 
Afton Burn 
Age of Kakanui Series 

,, Maniototian schists 

,, New Zealand (JIacial Period 
Ahuska-Treadwell Gold-mine 
Aleclryiru excelsum 
Alexandra district, thickness of Maniot< 

Series in 
Alfred, Mount . . 
Algip, action of, in format i(in of luff or liiii 

stone 
All Nations Mine 
Alluvial Hats 

,, mining 
Alpha lode . . . . . . 80 

Alps, Southern, valley glaciers in . . 

Alta, Mount 

America : harnessing wafer 

Ancient Briton Claim 

Anderson's lode 

Anderson's Mine 

Anortiiite 

Anticlinals 

Antimonite 

Antimony . . . . oO, 

,, -ore . . 
Apatite .. .. .. 70. 71 

Aphanite slate . . 

Arawata River . . 

Arbroath sandstone 

Area dealt with in bulletin 

Argillite 

Aristotelia raceinoaa 

Arrow band of chlorite-schist 

Arrow Basin, thickness of ice in . . 

Arrow Bridge 

Arrow Cirque 

Arrow Downs 

Arrow fault 

Arrow Flat 

,, a cirque 

Arrow glacial valley 
Arrow Glacier . . 
Anow gold-bearing lodes 
Arrow Gorge 

,, lodes of 

,, nature of 

Arrow lodes 

Arrow River 1, 2, 3. 8. 1 1. 13, 17, 20, 26, 29, 33, 34, 

55, 56, 57, 76, 81, 82, 83, 94, 96, 97 

flow of .. .. ..13 

,, value for motive jiower and 

irrigation . . . . 14 



PaK" 

22 

5 

85, 86 

7 

56 

56 

38 

,95,97 
77 
95 

77, 101 
31 

. 60 
59 
41 
75 
22 

(I 

. 57 
31 

. 69, 98 

.77.78 

. 73 

.95,97 

81, 82 

41 

22 

45 

78 

80 

77 

71 

57 

95 

74, 95 

95 

72. 



73 
60 
55 
35 
1 
59 
22 
56 
36 
29 

26, 27. 32, 33, 35 

..2,3 

.. 11,20,56,57 

14. 20, 28, 32, 68. 69 

26 

. 32 

.31.33 

. 5. 74 

. 97 

.75,80 

14 

.80-84 



Page 

Arrowtown . . 20, 26, 28, 30, 32, 33, 55, 

56,68,72,75,81.83,84 

Arrow Valley . . . . . . 8, 4:}, 71 

Arthur's Pass . . . . . . . . 67 

Point .. 11,12,18,21,31,67,68,97 

,, ,, Glacier . . . . . . 68 

Asia, Central, effects of deforestation in . . 46 
Aspinall, Mr. Miles . . . . . . 29 

Aspiring, Mount . . . . . . 41 

Assays . . 81. 82. 90. 91, 92, 93 

Athol .. 15, .TO. 60 

Atmosphere . . . . 2 

Auckland, gold-production of . . . . 96 

,, Islands, intense glaciation of . , 43 
.Augitc-diorite . . . . . . . . 69 

Aurum. Mount («»> .MdumI .\urum). 
Australia, Commonwealth of. water-power of 4.5 
Awatere beds of .Marlborough 41 

.Axis, polar, shift of . . . . 42 



Balsh's Mine 






77 


Barclay. Mr. 






78 


Barometric heights 






3 


Bivsalt in boulder-clay 






43 


Ba-scment rocks of Maniototo Series 




59 


Basic igneous rocks 






. 59 


Basic volcanic, contem 


poraneous . . 




57 


Bathvmetrical survey r 


>f lakes 


.")(> (7 .sti/. 


Bea.il Hay 






.21,. 30 


Beac-hes, old lake- 


. . 




. 16, 18 


Bcal. .Mr. h. O. 






. 7, 76 


Beech 






. 22 


Beech forest 






21 


Beech logs, submerged 






18 


Beetham, Mount 


14, 20. .30 


32 


33. 97 


Benches, ice-cut 






26 


Bendigo (Queenstown), 


reefs at 




.74,75 


Bendigo (Victoria) 






75 


Ben Iximond 


'.'. 1, 3, 9', 18, 


22,' 


31, 51 


Track 


. . 




2 


Saddle 






21 


Ben More 


'.'. 10,' 1.-), 


19, 


25, 64 


,, Glacier 


. . 




. 31 


,, ice-benches 






31 


Bernese Oberland (Swi 


tzerland) 




4 


Big Beach 


. . 




97 


Biotite 


. . 


71' 


, 72, 73 


Bishop, .Mr. T. Otto 


. . 




. 87 


Black .Angel 


. . 




. 78 


Black Miiori 


. . 




. 95 


Black Peak 






9 


Blue Hailes sandstone 






35 


Bob's Cove 14, 21, 22, 


28,34, 57,01, *)4, 


65, 


94. 100 


„ fossils at 


. . 




.66,67 


,, limestone 


. . 




99, 101 


„ marl 






. 100 


,, miocene marine strata at 




..4. 26, 






61, 


&c., 74 


sandstone for building purposes 


. 101 


Bonney, Professor 


. . 




. 38 


Borehole for coal, best site for 




. 100 


Boss of quartzose mica 


-schist 




34 



104 



Boiilder-clay . . . . 25, 

Boulder Lake, evidences of glac 
Boundaries of district 
Bowcu Peak 

,, erratics on . . 

Bracken 

,, binding-power of 
,, rapid spread of 
Bracken's Creek 
Gully 
Branch Creek . . 
Breccia-conglomerate, Tertiary 
,, -tufts in glacial till 
,, red and green 
Bridge lode, the 
British-American line of leef 
Brown-coal measures of Otago 
Bucklerburn, flow of 
Huilding-stone, limestone for 
Building-stones . . 
Hidlen Bros., Messrs. 
BuUeudale 

,, lodes 

Bulletin No. 2 . . ' 

No. 5 . . 
Burroughs, J\lr. . . 
Bush Creek 
Butcher's Creek 
Gully 



C. 



I'age 
27,30,34,43,(38,09 

iation at . . 40 

1 

10, 31, 07 

.. 26 

..21,22 

.. 22 

22 

.. 50 

..75,97 

80 

(U, 02, 04, 05 

.. 27 

00 

. . 91 

85 

and Southland 100 

15 

• !)'.), 101 

. . 101 

. . 84 

74, 75, 85 

..84-86 

. . 55 

55, 57, 59 

. . 34 

72, 80, 81 

. . 94 

11,20,90 



Calcareous ooze at Lake Hayes . . 18, 08, 74 

tuff .. .. .. ..74 

Cah'ite . . . . 58, ti9, 70, 71, 73, 96 

Caledonian lease . . . . . . 78 

Cambrian age of Maniototo Series. . . . 59 

Camijbell I.--iands, intense glaciaticn of . . 43 

Camptonite . . . . . . 69, 70 

Canterbury, forests of . . . . . . 45 

,, Plains, gravels of . . 41, 42 

Canton lease . . . . . . . . 78 

CapJes River . . . . . . . . 71 

Carbonate, copper- . . . . . . 95 

,, of lime, precipitation of . . 69 

Cardrona River . . . . . . 8 

Cardrona Saddle 

Carrara marble, experiments on . . 
Carrick Range, reefs at . . 
Cataclastic structure of peridotite rocks 
Cause of the glacial period 
Cave Hill 
Cecil, Mount 
,, Mountains 
„ Peak . . . . 3, 10, 14, 

Cdmisia 

Cement, marl and limestone for . . 

Centaur Peak 

Central Otago, deforestation of . . 

,, dry belt of 

,, schists of . . 

Chilmark stone of Tisbury 



74 



21 

38 

75 

70 

41 

34 

2 

101 

19, 60 

22 

100 

10 

46 

21 

58 

35 



Chlorite .. .. .. 4, 58, 71, 73 

Chlorite-schist 4, 32, 55, 56, 58, 62, 63, 76, 81 

„ bands of . . . . . . 11 

„ repetition of, due to Arrow 

Fault . . . . 20, 56 

,, thickening of . . 55, 56 

Chloritic mica-schist . . . . 90, 92, 94, 95 

Chloritoid matter . . . . 72, 73 

Clays in lodes . . . . . . 82, 83, 94 

,, in moraine . . . . . . 67 



Pagfe 
Claystono . . . . . . 4, 55, 60 

,, fossiliferous . . . . . . 59 

Cleavage, inciiiient, produced by ice-pressure 44 



Climate 
Clutha 



Coal 



drainage-area 
gorge of . . 



Coastal hills of Henley boulder-clay 

Collins Bay 

Columbia lode . . 

Concave slopes, ice-benching of 

Conglomerates . . 

,, fossiliferous 



2, 22, 23 

12, 23 

69 

2 

74, 100 

43 

52 

84 

32 

59, 60, 02, 07 

07 



Continental Europe, harnessing water in 

,, river-gauging in 

Continental ice-sheet of Queenstown 
division 



Sub- 



45 
40 

25, 40 



59, 74, 94 



Co(?k, Jlount, region . . . . . . 42 

Cook Strait : Northern limit of ice-sheet . . 40 
,, Pliocene and Pleistocene 

beaches of 
Cope, ilr. H.J... 
Copper 

,, -carbonates 
,, -pyrites . . 
Co])rosmas 
Coralline structures 
Corals . . 

Coi'inria rascifolia 
Cornish lode 
Coronet Creek . . 
Peak . . 

Range . . 9, 1 1, 14, 20, 30, 55 

,, ,, mammillated slopes of 

,, ,, outcrop curvature on 

,, Saddle . . 
Corrie Lakes 

Corrugations of mica-schist 
Cotton, C. A. . . 
Country rock, crushing and shattering of, in 

replacement lodes 
Cox, Professor . . 
Crag-and-Tail Hill 

(iS'ee also Penuisula Hill.) 
Crevasses, formation of . . . . . . 38 

,, vertical extent of . . . . 38 

Crichton, Mount . . . . 3, 10, 94 

,, ,, snowfield on . . . . 15 

Criterion lode . _. . . . . 83, 84 

Cromwell area, thickness of Maniototo Series in 57 
,, basin . . 



42 

83 

95 

94 

94 

22 

67 

03, 07 

21, 22 

84 

75 

9 

97 

32 

43 

30 

40 

58 

7 

70 
16, 60 
17, 21, 34 



Crown Peak 
Crown Range 2, 3, 
Crown Terrace . . 
Crystal lode 
Cucidlcea 

,, alta 
Cunningham, Mount 
Current bedding 
Curvature of outcrop 



8, 14, 20, 21, 32, 33, 55, 
3, 14, 27, 29, 32, 33, 84, 



D. 



Darley Dale sandstone 
Dart Glacier 

,, River 
Dead Horse Creek 
GuUy 
Deadman Gully 
Dean Forest sandstone 
Dee . . 
Defiance line of lode 



55 
3 
56 
97 
94 
67 
67 
10 
68 
43 



.. 35 

31 

15, 17, 55 

.. 62 

64, 96, 97 

.. 87 

.. 35 

43 

.. 78 



105 



t)efoi'estation, wide-reaching effects of, on 

climate 
Delta lode 
Dentalium 

,, MaiUdli 

Depression, line of, following Solio Fault 
Description, general, of district 
Diabase 
Differential subsidence, formatiou of l^ake 

Wakatipu by 
Diorite 

,, as erratics 

in till . . . . . . : 

,, in Takitimu conglomerate . . 
Discuriii loumutou 
Discharge of Kawarau River 

,, smaller rivers and streams 

Discoveries by t ieological Survey . . 
Dislocation, aid to ice in excavation 
Dispute, Uke . . . . I.S, 18, l'.», 

,, ,, valley of . . 

Dolerite in boulder-clay 
Dominion, total gold-production of tlic 
Don 

Douglas Island, Alaska 
Drncophyllum uiiiflorum . . 
Drainage system, establishment of great 
Drift Bay 

Drifts, fluvio-glacial 
Dry Ix'lt of ( 'entral (>tago 
Dubliu lode 

Duke of Wellington No. 2 South lease 
Dunite . . 
Dykes, absence of, in .Vlaniototo Series 

„ at source of Shotover 



E. 



Pago 

4o, 4() 
80, 82 
1)6, 67 
63, 67 

20 
1 

60 

15 
60 
28 

27, 28 
60 
22 
48 

48, 4<J 

SO. 81, 82 

40 

fi7, lol 

10. .{4 

43 

06 

43 

75 

22 

11 

20 

28, 30 
21 

70, 80 
78 
60 
59 
59 



(id 



27, 



Earnslaw, Mount 


15, 41, 


55 


East coast of South Liland : glaciers reached 




sea during glacial epoch 


40. 


43 


Eastern lode (Shotover Consolidated Mine) 86, 


87 


Earth - movements after close of .Miocene 




Period 




57 


Echinoderm 




67 


Economic geology 




74 


Economic minerals of Kakanui Series 




60 


,, ,, .Maniototo S<Tie8 




59 


Edward, .Mount 




10 


Edwin, Captain R. A. 


. ■ 7, 


23 


Eglinton country 




60 


,, River, divide between, and 


Lake 




Te Anau 




28 


Elevation, differential, of South Island 




41 


„ ,, evidence for 




42 


End Peak 




9 


Enstatite 




70 


Epacris panciflora 




22 


Epidote 


!.58 


,95 


Epidotisation . . 




58 


Equatorial sea-currents . . 




42 


Erosion, ice- 




25 


Erratics . . 26, 28 


33,43 


44 


„ character of 




69 


,, exfoliation of striated skin of 




43 


Eruptives, absence of, in Kakanui Serie 


< 


60 


,, ,, in Vlaniototo Series . . 


59 


Escarpment of Tertiaries. . 




65 


Eskar, Queenstown 


30, 


31 


Eskars 




26 


Eucalypti 




2 


Eureka lode 




94 


Excavating-power of glaciers 


38. 39, 


40 



Page 

Exfoliation of striated skin of erratics . . 43 

Expedition to Auckland and Campbell Islands 43 

Eyre Mountains . . 1,3, 8, 10, 12, 21 

,, ice abrasion on . . . . 35 

,, small drainage from, into 

Lake Wakatipu . . 15 



Fagns Blarii 


22 


,, diffortioides 


22 


,, fusca 


22 


„ Menziesii 


22 


,, Solandri . . 


22 


Fahlband 


95 


Farell's Consolidated Mines 


78 


Faults . . . . 10, 


20 


,, causing dislocations of ^old shoots .. 


77 


,, in Maniototo Series 


.")() 


(See also Table of Coriteuls, Cliuptcr 11.) 




Feldspar .. . . (iO. 70, 71. 72, 


73 


,, -porphyrite 


69 


Ferric oxide 


70 


Ferro- manganese ore 


95 


Ferro-magnesian mineral 


71 


Ferry Hill . . . . . . 34, 35, 50 


71 


Finn's Lea.se No. 4 


78 


Fiords 


40 


„ as a measure of pre-glacial uplift 


42 


Fim, or glacier-ice, a vicous mass 


37 


First Creek . . . . 81, 


82 


Firth's 


21 


Fissure-veins 


76 


Five-mile Creek .. . . 2, 10, 16 


18 


Flora .. .. .. .. 21, 


22 


Flow of liquids and solids compared 


38 


Fluvial jwriod . . 


41 


Fluviatile activity during last retreat of 




glaciers 


41 


,, erosion, action of, along Soho Fault 




line 


20 


Fluvio-glacial drifts . . . . 73 


97 


Fog Peak 


9 


Folding, tectonic, absence of in Maniototo 




Series 


56 


Foliation of schists 


58 


Foothills, morainic 


30 


Forbes, Dr. Charles 


5 


Forbes Mountain 


15 


Forbes, Principal James . . 36 


37 


Forests, al)iinc and subalpine, importance of 




preservation of 


46 


Forest-trees 


22 


Formations, table of 


54 


Fortification Hill 


34 


Fossils . . . . . . 66 


67 


Fracture and regelation theory of Tyndall . . 


38 


Frankton . . . . . . 16, 


70 


Arm 1, 2, 14, 18, 28, .30, .34, .50, 53 


68 


or Kawarau Flat 2, 3, 17, 34 


68 


„ Terrace 


68 


Freestone, English 


101 


Freezing and thawing, alternate, disintegrat- 




ing action of . . 


36 


Fuctma excoriicata 


22 


Fucoid stems 


63 


Fuel of globe, rapid exhaustion of . . 


45 


Furrowing action of glaciers 


40 


G. 




Gallant Tipjjerary Company . . 86, 


87 


Gamma lode .. .. .. 80, 81, 


82 


Garibaldi Mine . . . . . . 77, 


78 



106 



M\. 



95 

58 

46 

47 

22 

16, 39 

16 

1 

4 

. . 54 

1, 9, 22 

22 

4 



Garnet 

,, rock 
Gauging of rivers, importance ol . . 

,, principles of 

Oaultheria aniipoda 
Goikie, Processor James . . 

,, Sir Archibald 
General description of district 
,, geological features 
geology.. 
Gentian 

Gentiana corr/mbijera 
Geological features, general 

Geological section, scale, &c., of . . . . 4 

Geological Survey, discoveries by . . 80, 81, 82 

Gieraldiue lease . . . . . . . . 78 

Gilbert, Mount . . . . 3, 10, 57, 61, 63, 64 

Glacial drift, schistose . . . . . . 32 

,, erosion, formation of Lake Wakatipu 

by .. .. ..15 

,, ,, action of, along Soho Fault 

line . , . . . . 20 

,, Lake Wakatipu . . . . . . 16 

,, Period, age of . . . . . . 41 

,, ,, cause of . . . . . . 41 

,, Period in New Zealand . . . . 25 

,, ,, Northern Hemisphere . . 36 

„ till .. .. .. ..26 

,, ,, origin of . . . . . . 27 

Glaciated Remarkables . . . . . . 32 

Glaciation . . . . . . . . 25 

,, extent and character of . . 25 

,, in old Arrow Valley . . . . 14 

,, in Pleistocene Period . . . . 4 

Glacier-benches . . . . . . 20 

,, of Ben More . . . . 19 

„ of Remarkables and Cecil 

Peak .. .. ..19 

Glacier-ice, distortion of schists by . . 55 

Glaciers, excavating- power of . . 38, 39, 40 

motion of . . . . 36, 37, 38 

Gladstone Claim . . . . 77, 78 

Glenorchy . . . . . . 15, 19 

Glenrock Consolidated Company . . 78, 79 

Gold . . . . . . 73, 74, 76, &c. 

Gold-production, total, of the Dominion . . 96 

Gold, shoots of . . . . . . . . 77 

Gold-bearing lodes . . . . 75-94 

veins . . 59, 73, 74, 75, &c. 
Goldbum . . . . 1, 13, 20, 28, 80, 97 

,, flow of . . . . . . 14 

Golden Bay, climate of . . . . . . 23 

Golden Treasure Mine . . . . 77, 78 

Gold-mining : influence on industrial enter- 
prise . . . . . . . . 75 

Gold- wash . . . . . . . . 58 

Gordon, Mr. Henry A. . . . . 76, 79, 85 

Granite, erratics of . . . . 28, 29 

,, petrology of . . . . . . 73 

,, in Takitimu conglomerates . . 60 

in till . . . . . . 27, 28. 

Graptolites . . . . . . . . 59 

Gravels, fluvio-glacial . . . . 27, 30, 67 

,, in eskar . . . . . . 30 

Great drainage-system, establishment of . . 11 

„ faults .. .. .. ..20 

Greenstone breccia in glacial till . . . . 28 

Greenstone Glacier . . . . . . 31 

Greenstone River . . . . 15, 28, 60 

Greenstone Section . . . . . . 60 

Greenstone-tuif, erratics of . . . . 69 

Greta beds of North Canterbury . . . . 41 

Greywacke . . . . 4, 55, 58, 59, 60 

„ altered, as buildiug-stone . . 101 



Greywacke as erratics 
drift 
,, in glacial till 

,, schistose 

Gritstone 



Page 

28, 29, 30, 44, 69 

33, 67 

27, 28, 32 

. . 30 

62 



15, 43, 



H. 



Haast, Sir J. von, on New Zealand Ice Agi 
Haematite 

Hamilton and O'Nfill's Mine 
Hamiton, Harold 
Hamlet, Mount 
Hanging valley ; . 
Hartzbergite, petrology of 
Hawkins, Warden 
Hayes, Lake. (See Lake Hayes. 
Hector Range . . 
Hector, Sir James 
Heights, table of 
Heim, Professor 
Henley boulder-clav 
Henley Hills . . " 

Herringbone-stitch structure in mica-schists 
Hidden Falls Creek 
Highlaw, Scotland, eskars at 
Hogan's Road erratics 
Hokaniii Range 
Homeward Bound line of reef 
,, lode . . 

„ Mine . . 

Hornblende 
Hornblende-diorite, erratics of 

,, petrology of 

Hornblende-lamprophyre, erratics of 

,, petrology of 

Hornblende - syenite 

,, petrology of . . 

Horse . . 

Humboldt Mountains 
Hummocks, ice-grooved . . 
Hutton, Captain 

,, ,, opposed to glacial period 

New Zealand . . 
Hyde, Mount 

Hydrodynamics, glacier-ice obeys laws of 
Hydrographical branch of Department 

Interior (U.S.A.) 
Hydrology 
Hypersthene 

,, -diorite 

,, -gabbro (see Norite). 

,, „ erratic of 



26 

58 

77, 80 

7 

3, 10 

32, 40 

70, 71 

78 

36 

51,52 

23 

16, 38 

25,43 

40 

58 

.. 71 

.. 31 

29. 30, 33 

.. 60 

77,78 

.. 80 

.. 77 

58, 69, 70, 72, 73 

69, 72 

.. 72 

59, 67, 96 

69, 70 

.. 69 

72, 73 

76, 77 

10, 15, 33 

26 



16 



43,61 
1 

25, 26 
. 3, 9 
. 38 



of 



. 46 
. 45 

71,72 



28 



Ice Age in New Zealand, character of . . 25 
,, ,, maximum in Pleis- 
tocene . . . . 41 

Ice benching on concave slopes . . . . 32 

Ice-cirques . . . . . . . . 40 

Ice-cut benches . . . . . . 26 

,, rock platforms . . . . 32, 33 

Ice-erosion, marks of . . . . 9, 10. 25 

Ice-plasticity . . . . . . . . 37 

Ice-plateau of Central and Western Otago . . 40 

Ice-shearing . . . . . . . . 32 

Ice-sheet, continental . . . . . . 29 

,, depth in Pleistocene Period . . 5 

,, direction of flow of . _. . . 33 

,. evidence for former existence of . . 29 



107 



tee-sheet, northom limits of . . . . 40 

polar, former exteasioii of, to New 

Zealand . . . . . . 43 

thiclviiess of . . . . . . 35 

Ice-terraced mouiitain-slo])es . . . . 31 

Indian Glenrock Company . . . . 79 

Infra-glacial material . . . . . . 27 

Involvement of marine Tertiaries . . (il, (i2, 63, 64 

depth of . . . . . . 63 

Iota lode . . . . . . SO, 82 

Iron, -Mount . . . . . . . . 35 

Iron-|)ero.\ide . . . . 57. 73 

Iron-pyrites . . . . . . W 



Jack's Point 
Jennings Creek . . 
Johnson I^ake {.tee Lake Johnson). 
Johnston lode . . 
Junction lode No. 1 
No. 2 
Junction lodes . . 
Jungfrau 
Jura (white) 



, 


. 


20 




!)1. 


94 
!I4 


8!», 


y<). 


91 




90 


91 
93 
61 
61 



K. 



)f 



.. I, 34, 51), (in 
marine Ter- 

01 
60 
94 
4 
60 



Kakanui .Series . . 

„ involvement 

tiaries in 
,, Halation to .Maniototo Series 

scheelite in 
,, siib-scliists 

„ succession of rocks of 

(Sep aho Table of Contents, Chapter \'I. 

Kame . . 

Kaolin 

Katherine leader 

Kawarau l)rauch of Wakatipu CJIacier 20, 27, 

Kawarau di.strict, character of mioi-sehist in 

Kawarau drainage-area . . 

Kawarau Falls .. .. 3. 12, 15, 17. 

develoj)ment of power at 

Kawarau Fault . . 

Kawarau (Jorge 

Kawarau or Frankton Flat 

Kawarau River . . . . 2, 8, 12. IS. 20, 

,, damming back of, by Shotover 

„ gauging of 3, 12, 46, 

,, graduated gauge in 

Kawarau Valley 

„ glacier in 

Keele, Mr. Richmond 

Killamey line of lode 

Kilpatrick Lake {nee Lake Kiipatrick). 

Kingston moraine 

Konini. . 

Koromiko 

Kowhai 



2,21, 



7, 



72, 
32, 

21. 

20, 
32, 

20, 

12, 

47, 

22. 

14, 



2, 



30 
73 
78 
33 
55 
69 
40 
48 
21 
55 

2 
08 
,48 
48 

3 
67 
31 
23 
79 

15 
22 
22 
22 



Labradorite 

Lady Fayre lode 
„ Mine 

Lagoons 

Lakes . . 

„ subalpino, due to glacial excavation 

Lake Dispute . . 13, 18, 19, 60, 67, 101 

„ „ valley of . . . . 10, 34 

„ Hayes 2, 17, 20, 26, 29, 33, .34, 

40, 51, 52, 53, 68, 74 



71 
80 
78 
20 
14 
38 



Page 
Lake Hayes, a hollow at the foot of a .sto/m- 

seite . . . . . . 35 

,, ,, area . . . . 17, &c. 

., ,, bathymetrical survey of . . ,50 

,, ,, calcareous ooze at . . 68, 74 

,, ,, calcareous tuff at . . . . 74 

,, ,, greatest depth of . . . . 17 

,, ,, level above sea . . . . 17 

„ limestone . . . . 97-99 

„ -Johnson 18, 27, 28, 34, 40, 52, 

53, 69, 70, 71, 72 

,, ,, a hollow at foot of slo6K-seite 35 

,, ,, bathvmetrical survey of 50, 51 

length, &c. . . . . 18 

„ Kilpatrick.. .. .. 13, 18, 67 

,, ,, bathymetrical survey of 51, 53 



13. 19.20.31 



,, length, &c. 

Lochnagar 
Luna 

,, access to 

,, ice benches 

,, length, &c. 
Moke {see Moke Lake). 
Rere, rocks at 

Rotoiti, evidence of glaciation at 
Rotoroa, evidence of glaciation at 
Te .■Vnau . . 



IS 

29 

40, 94 

19 



.31 



32 
19 



60 
40 
40 
27, 28, 60 



Wakatipu 1, 3, 8. 12, 14, 15, 16, 17, 18, 19, 
20. 21. 27. 28, 30, 33, 34, 35. 
40. .56, .59, 61, 64, 65, (iS 



18,62 



:!l 

14 

14, 15 

52, 53 

15 

15 

16 

14 

35 

82 

10 

34 

62, 63 

22 

94 

71 

99 

()5. (i6 

OS, 99 



80, 
. 3, 



,, a basin at fool of .ttoss-.teiUi 

,, ,, aimual range in level 

,, ,, area, Jtc. 

,, bathymetrical survey of 51 

,, „ basin, origin of . . 

,, „ catchment-area of 

,, ,, glacial 

,, ,, shore-line 

,, Wauaka, islands in 
Lanilida lode 
Larkins. .Mount 
Lee-xeite 

Ijeft-hand Branch, Skipper's Cn-ek 
Leplonpniiium scopurium . . 
Leviathan lode . . 
Lherzolite 

Linu' from limestone 
Limestone 

,, a.s a fertiliser . . 

economic value of 67, 74, 97, 99, lol 
Limofxtis . . . . . . . . 67 

Literature . . . . 5 

Livingstone .Mountains . . . . . . 33 

I>ochnagar, I>ake . . . . 29 

Loch Ness . . . . . . 52 

Lochy River, flow of . . 15 

Ix)de-matter, brecciation of, in replacement 

lodes . . . . . . . . 76 

Ixjndonderrv Creek . . . . . . 9(i 

L(mg Gully" .. .. .. ..11,21 

Lower Miocene : Oamaru Series . . . . 60 

Lower Shotover district, nature of mica-schist 

in . . . . . . . . 55 

Lucas, .Mr. Keith . . . . 51, 52, 53 

Luna Lake {see Ljike Luna). 

Lyell .. .. .. .. ..38 



M. 



Macandrew .Mountains . . 3, 8, 9. 10, 12, 20, 21, 29 
,, formerly ovenidden by 

ice . . . . 35 

„ outcrop, curvature on 43 



108 



Page 
Macandrew, Mr. James . . . . . . 10 

Macetown 1, 20, 28, 29, 55, 56, 71, 78, 79, 80, 96 

,, district, nature of mica-schist in 55 

erratic .. .. 28,29,33,43 

,, gold-bearing lodes 5, 59, 74, 75, 76-80 

,, ,, characteristics of 75 

,, road, quartz vein on side of . . 81 

Mackay's Claim . . . . . . 78 

Maclaurin, Dr. J. S. . . . . . . 7, 99 

Maconnachie's Creek . . . . . . 94 

Magnetite . . . . 58, 69, 70, 71, 72, 73 

Makomako . . . . . . . . 22 

Malm .. .. .. .. ..61 

^lammillated slojies of Coronet Range . . 32 
Manuka . . . . . . . . 22 

Maniototo Basin . . . . * . . 54, 55 

,, schist, thickening of . . . . 4 

„ Series . . . . . . 54 

,, ,, age of . . . . . . 59 

„ ,, basement rocks of . . 59 

(See also Table of Contents, Chapter VI.) 
Maori Point .. .. .. 11, 12, 13, 90 

Marine conglomerate on Richardson Moun- 
tains . . . . . . . . 4 

Marine Tertiaries, economic value of . . 67 

involvement of 61,62,63,64 

„ thickness of . . . . 66 

„ warping of . . . . 65 

Marl at Bob's Cove . . . . 74, 100 

Marly clays, fossils in . . . . . . 67 

„ economic value of . . . . 67 

Jlarly greensands, fossils in . . . . 67 

Marsden, Moimt . . . . . . 9 

Marshall, Dr. . . . . . . . . 71 

Maryborough Mliae . . . . . . 77, 78 

,, line of reef. . . . . . 77 

lode . . . . . . 80 

Massif near Milford Sound . . . . 29 

Matukituki River . . . . . . 9, 59 

Mcintosh. Mr. R, . . . . 77, 78, 79 

McKay, ilr. A. . . . . 16, 21, 22, 43, 61 

McKerrow, James . . . . . . 15, 51 

Mechanics of warping of Tertiary strata . . 66 
Mer de Glace, measurements on . . . . 36 

Metallic sulphides . . . . . . 90 

Metamorphism of mica-schists . . 55, 58, 59 

Mica . . . . . . . . . . 71 

Micaceous matter . . . . . . 57, 90 

Micaceous rocks . . . . . . 4 

Mica-schist 4, 12, 17, 19,29, 30, 32, .33, 35, 39, 
43, 55, 56, 57, 58, 59, 62, 63, 74, 
76, 80, 81, 82, 83, 90, 91, 92 



,, corrugations of 

,, crushed 

„ crushing-strength of 

„ gold-bearing . . 

,, in glacial till 

,, metamorphism of 

,, of Remarkables 

„ of Scotland . . 

,, origin of 

,, quartzose 

,, roches moutonnee-i 

general trend of 
„ thickness of . . 

(See also Maniototo Series.) 
ilid-Wakatipu Survey District 

ililford Sound . . 
Miller's Flat 
Miller's Flat moraine 
Miocene strata . . 

,, strips of 

Miocene marine strata at Bob's 
Miocene Tertiaries, wedges of 



58 

86, 88, 94 
.. 35 
..94,97 
.. 27 
.. 58 
.. .35 
.. 35 
.. 58 
55 



. . 31, 33, 34, 

parallel to 



26 
56 



. . 1, 14, 19, 20, 

54, 59, 69 

..29,71 

32 

30, 67, 97 

5 

11 

Cove . . 4 

..4 



Page 
Mode of conducting work . . . . 3 

Moke Creek . . 1, 13, 28, 31, 67, 94, 96, 97, 100 
,, copi)er-lode .. .. ..94,95 

Moke Gorge . . . . . . . . 18 

Moke Lake . . 2, 13, 18, 31, 33, 40, 52, 94, 100 

,, access to . . . . . . 18 

„ area, &c. . . . . . . 18 

,, bathymetrical survey of ..51,53 

Moke Valley . . . . . . . . 10 

Molasse sandstone . . . . . . 35 

Molecular strain producing exfoliation . . 44 
Monk's Terrace . . . . . . . . 96 

MontAU . . . . . . . . 59 

Moonlight Creek 1, 10, 12, 13, 19. 20, 61, 

62, 63, 64, 65, 67 
„ Fault or shear-plane or thrust- 
plane 20, 21, 29. 56, 57, 67, 96 

18 

96 

2 

30,40 

40 

26 

78 

99 

35, 97 



„ Gorge 
Moonlight Hydraulic Sluicing Company 
Moraine rock 
Moraines . . . . ^ . . 

,, coastal 
Morainic matter 
Morning Star Mine 
Mortar, limestone for 
Morven Hill . . . . . . 34, 

Moss, action of, in formation of tutf or lime 

stone 
Motion of glaciers . . . . 36 

Motutapu Mount 
„ Range 

,, River 

Mount Alfred 
Alta 
„ Aspiring . . 

Aurum .. 1, 3, 10, 12, 15, 29, 55, 
„ ,, Gold-mining Company 

Beetham . . 14, 20, 30, 32, 

„ Cecil 
,, Cook region 
„ Crichton . . . . 3, 

„ ,, snow^eld on 

,, Cunningham 



Eamslaw . . . . 15, 

„ Edward 

„ Gilbert . . . . 3, 10, 57, 61 

,, Hamlet 

„ Hyde 

„ Iron 

„ Larkins 

„ Marsden 

,, Motutapu 

,, Nicholas 

,, ,, Moraine 

„ ,, ,, origin of 

„ Soho 

„ St. Just . . 

„ Tyndall .. 
Mountains, age of 

,, of Western Otago . . . . 64 

Mountain-ranges . . . . . . 3, 8 

,, origin of . . 10, 11 

(See also Table of Contents, Chapter II.) 
Jlountain -slopes, ice-terraced . . . . 31 

iloutere Hills, gravels of . . . . . . 41 

Mudstone . . . . . . . . 58 

Mullock . . . . . . 76, 77, 83, 84 

lode . . . . . . . . 76 

Murchison . . . . . . . . 38 



63 



68,98 

37,38 

9 

3 

3, 8 

31 

22 

41 

85 

85 

33, 97 

2 

42 

10, 94 

15 

10 

41, 55 

10 

03, 64 

3, 10 

3, 9 

35 

10 

9 

9 

10, 15 

30, 67 

31 

3, 8 

3, 9 

16, 38 



Natica . . 

Native heath 

Nature of work carried out 



63, 66, 67 

22 

3 



109 



iJicholas, Mount. (See Mount Nicholas.) 
Niger Peak 
Nine-mile Creek . . 
Norite . . 

,, erratics of 

,, in Takitimu conglomerate . . 
„ in till 
,, ]ietrology of 
North Island, continuous deposition 
southern part of, since older Pliocene 
Norway, harnessing water in 
Nugget Company 
Creek ". . 
Point .. 
Number 1 lode (Stevenson's sluicing claim) 

2 lode 
Nunil)ei-s .■}, 4, and 5 lodes ,, 
Nummulitic limestone in the .Malm, Switzer- 
land 



0. 

Oamani area, traces of glaciers in 



Page 



i;?, 18 


li) 


(iO 


69 




28 




60 


27, 


28 




71 


in 






42 




45 




86 




80 




(JO 


a)'.'. 


92 


92. 


93 




9:} 



4. 61 



60, 61, 62, 6;{, 64. 
f Contents. ( 'ha|ilfi 



Scries 
{Set- iijso T.il) 
()l)eiland. Boniest 
Old lake-beaches 
Old Man ( 'reek . . 
Old Ph.»*ni.\ Mine 
Olenrifi niujiixtijolin 
,, ftviceiinitFliilia 
,, (,'olen.ioi . . 
,, For uteri . . \ . 

,, jurfvrarea 
., Haasii 
„ in.tignig . . 
„ macrodonta 
,, moxchaUi 
,, nilida 
,, iiummiilariji)liii 
,, (deifoliti . . 
Traillii .. 
,, Trarersii 
,, rirgnia . . 
01igocla.se 
Olivine 

■' One-mile " . . 
Ooze, calcareous 
Ordovician graptolites 
Ore-shoots in veins of Kakanui Series 
Origin of mountain-chains 
Orthocla.se 
Ostrea . . 

,, WuUcrslorfi 
Otago, coal-measin-es of . . 
,, forests of 
,, gold produced in . . 
,, gold-])roduction of 
,, gravels of inland ba.sin of . . 
,, ice-sheet which covered 
,, industrial future of fiords of 
Otakaia, Henley boulder-clay at . . 
Outcrop-curvature 
Overthrust faults 

,, folding cause of thickening 

schists 
Oyster . . 
Oyster in breccia-conglomerate 



Palaeozoic sea, shore-line of 
Park, Mr. R L. 



>."). (i6 


. 67 


\\.) 


i\ 1 


Hi 


. 18 




20 




84 




22 




22 


. . 


22 


, , 


22 




22 


, . 


22 


, , 


22 




22 




22 




22 




22 




22 


, . 


ii 


, . 


22 




22 




73 




70 


. . 


2 


, . 


68 




59 




(JO 


10 


11 


72 


73 




66 


63 


66 




1(K) 




45 




74 


95, 


96 




41 




40 




45 




43 


43, 


55 




57 


of 






58 




67 




62 



58 

7 



58, 



19. 



Page 
Pay-shoots, probable continuation of . 75 

Peat's lode . . . . . . 88 

Pecteii . . . . . . . . ()7 

Penck, Professor . . . . . . Ki, 3fl 

Peninsula Hill .. .. .. ..20,21 

Perched blocks . . . . . . . . 26, 29 

Peridotite rocks, cataclastic structure of . . 70 
Perseverance Peak . . . . . . 22 

„ erratics on . . . . 26 

,, greywacke, gravel on . . 27 

Petrology of schists . . . . . . 57, 58 

,, cryst-alline and igneous rocks in 

drifts 
PhtEnix E.vtonded Mine . 
Phoenix Mine 
Phonolite in boulder-clav 
Pliyllite 

Phyllitic rock . . 
Physics of glacier-ice 
Physiography 
Pigeon Island 
Pig Island 
Pinna . . 
Pisa Range 

Plagioelase-feldspar . . 58, 

Platforms, ice-cut rock- .. 
Pliilte.n.. 

Pleasant Creek . . 
Pleistocene 

l)eds of W:insanui 
Period, dcjith of iieshce( in 
,, glaciation in . . 
Pliocene and Pleistocene sea-beaches of Coo 

Strait 
Pliocene beds of South Island 

,, Wanganui 

Pliocene strata . . 

,, strijis of . . 

Pluvial period 
Poilf/carj/u.i toUiru 
Polar axis, shift of 
Polniaisc sandstone 
PopJurs 

Potomac red sandstone 
Premier Consolidated Coni|iany 
Premier line of lodes 
,, lode 

Mine .. 13, 74, 77, 78, 79 

,, -Sunrise (New Zealand) Gold-mining 

Comi)any . . . . . . 79 



69 

84 

84 

43 

59, 60 

. 85 

36 

8 

5.3 

33, 53 

.63, ()6 

55 

71, 72 

. 32, 3.! 

.35 

96 

. 67 

41 

. I, II 

42 
41 
41 

6 
11 
42 
22 
42 
35 

1 
35 
78 
76 
80 



,, -Tipperary lode . . 
Prevailing rock . . 
Previous geological work 
Paevdamnssium Hutloni .. 
Pterix aqiiilinn . . 
Publications, j)revious 
Pug in Macetown lodes . . 

(Ste. also Shotover Faidt.) 
Pug lode .. .. 11, 20, 57 

Pukctoi Range . . . . 54 

Punt-ferry, Kawarau River, gauging-station 

near 
Pykc River 

PjTites . . . . 70, 73, 76, 85 

PjTitic lode, the 

,, ore, assay of 



75, 80 

4 

5 

67 

21 

5 

76 



Q. 

Quartz .55, 57, .58, 60, 73, 75, 7<), 79, 80, 81, 

82, 83, 84, 89, 90, 91, 92, 93, 94 

as.says of . . 81, 82, 90, 91, 92, 93 

,, in boulder-day . . . . 43 

„ in glacial till . . . . 27, 32 



no 



Page 
Quartz in marine Tertiaries . . . . 2!) 

„ lenses . . . . . . . . 86 

„ -mining : cconomif possibilities 74, 75 

,, replacement by. in leiilacement lodes 76 
,, shoots of, in Premier lode . . 76 

,, -schist, micaceous . . 32, 55, 56, 57 

Queenstown ], 2, 14, 15, 16, 18, 19, 21, 22, 23, 

29, 30, 34, 51, 52, 59, 61, 62, 68, 69, 100, 101 



Qucenstown area 






. . 67 


,, 


Bay 






1,2,30,53 


,, 


Domain 






. . 17, 23, 30, 69 


,, 


Eskar 






..30,31 


„ 


Esplanade 






2 


99 


Fault 






..20,21 




Hill 
,. till of 




1 


, 2. 18, 27, 30, 31 

. . 27 


" 


moraine 
Park 


28, 


30, 


44. 67. 69. 70, 72 
2 



2, 23, 


45, 46 


16, 


38, 39 




. 22 




. 22 




. 20 




. 78 




. 73 




71 




. 31 




.15,17 




. 55 




41 


97'. 


98, 99 



E. 

Rainfall 

Ramsay, Sir Andrew 
Raoulin 

Raoulia Parkii. rapid sjiread of 
Rapid Creek 
Raven, Mr. 
Recent deposits 
Red Hill 
Rees Glacier 
,, River 
,, Valley 
Refrigeration in older Pleistocene 
Reid and McDowell, Messrs. 
Remarkables .. .. 2,17,20,21,35,36 

„ glacier benches of . . . . 19, 32 

,, small drainage from, into Lake 

Wakatipu . . . . 15 

Rendu, Canon, on physics of glacier-ice . . 36 
Replacement lode . .' . . . . 74, 75 

Rere, Lake, rocks at . . . . . . 60 

Rhodonite . . . . . . . . 95 

Richardson Mountains 3, 8, 10. 12, 13. 19, 21, 

26, 29, 31, 61. 62, 63, 64, 96 
„ fossiliferous Miocene 

conglomerate on . . 4 
,, ice-abrasion on . . .35 

,, outcrop-curvature on 43 

,, rock benches on . . 20 

„ small drainage from, 

into Lake Wakatipu 15 
Ridges, tent-shaped . . . . . . 12 

Rift Valley, lower ))art of Lake Wakatiim . . 20 
Right-hand branch. Moke Creek . . . . 18 

Shotover .. ..20,61 

,, Stream . . . . . . 12 

River-beds . . . . . . . , 73 

River- and stream-bed wash as a source of 
gold .. .. .. ..96,97 

River-terraces on Shotover . . . . 13 

Rivers and valleys . . . . . . 12-14 

., discharge of smaller . . . . 49 

Roberts, Mr. E. F. . . . . . . 7 

Roches moutonnies . . . . . .26,40 

Rock-basins . . . . . . . . 26 

Rock-benches .. .. ..12,19,20,25 

,, mechanics of excavation of . . 32 

Rock-flow . . . . 17, 18. 27, 68, 97 

Rock-hummocks or ruches inoiitonnees . . 26 

Rock-platform . . . . . . . . 92 

Rock-tarn . . . . . . . . 20 

Rocks of Kakanui Series . . . . 59 

„ Maniototo Series .. ..55,56 



Rodger's Gully . . 

Rotoiti. T>ake, evidence of glaciation at 

Rotoroa, Lake, evidence of glaciation at 

Rushes, action of, in formation of tulT 

Ruskin on glaciers 

Rutile . . 



P.ige 
95 
40 
40 
6S 
39 
58 



S. 



Saddle Hill 
Sandhills Creek . . 
Sand in eskar 
Sand in glacial drifts 
Sandstone 

Sandstones, Bob's Cove, for building 
eeonomic value of 

,, fossils in 

„ siliceous 

Sawyer's Creek . . 
Saxonite, erratic of 

„ petrology of . . 
Scalaria 
Scanlon's Gully 
Scheelite 
Schiller stnicture in hypersthene 



35. 



.40,43 

. 96 

. 30 

.30,67 

62. 63 

. 101 

. 67 

. . 67 

63 

76, 94, 96 

69 

..70,71 

. . 67 

28, 71, 76, 79, 80 

. . 59, 60. 74, 94 

..71.72 



Schist crushed and broken 
,, foliation of 
,, in drift . . 
,, in glacial till 
,, in marine Tertiaries 
„ involving marine Tertiaries . . 
„ Maniototian, area covered by 
,, metamorphism of . . 
,, minerali-sed 
,, origin of . . 
,, petrology of 
Scooping action of glaciers 
Scope of the work 

Scotland, thickness of the ice-sheet on 
SefFer's Creek 
Senecio Bidwillii 
,, Buchanani 
,, elaeacjnijoliim 
,, Grezii 
„ Hectori . . 
„ Uuntii . . 
,, laxifoliiis 
,, Mnnroi . . 
• „ re.volidus 
Sericitic mica 
Serpentine 
Scrpentinous matter . . . . . . 70 

Sew Hoy C'laim . . . . . . 97 

Shadrach Creek . . . . . . 83 

Shares of Criterion Company . . . . ' 84 

Shoot in Criterion lode . . . . . . 84 

Shore-line of Maniototo times . . . . 55 

Shotover Consolidated Mine 74, 7.5, 86, 89 

„ district . . . . . . 57 

Fault .. .. .. 11. 20, 56, .57 

Glacier .. 30, 31, .32, .33, 68 

„ ,, origin of . . . . 31 

,, gold-bearing veins of . . 59, 74 

,, ,, characteristics 

of . . 75 

gravels . . . . 68, 69, 70 

„ Junction . . . . . . 89 

„ and Skipper's Point lodes 86-94 

River 1, 2, 3. 8. 9. 1 2, 28, 29. 34. .50, 54, 

59. 61 . 67. 08, 69, 86, 87. 88, 

92, 93. 94. 95, 96. 97 

.. flow of .. .. .. 12 

„ llold in bed of . . ^ . . 97 



79. 82, 84. 86, 89. 93 

.58 

.. 67 

.. 27 

29 

61, 02, 65 

58 

58 

.. 95 

.. 58 

.. .57 

40 

3 

.. .36 

,62, 100 

22 

.. 22 

.. 22 

.. 22 

22 

22 

.. 22 

.. 22 

22 

..58.72 

59, 60, 70 



Ill 



Page 

Shotover Survey District . . 1, 54, 09 

Valley .. .. 1,8,43 

„ „ a hollow at foot of a .stoss- 

seite . . . . . . 35 

Silberhom (Switzerland) . . . . . . 4 

Silica, (le])08ition of . . . . . . G2 

Sills, absence of, in Maiiiototo Series . . 59 

Silts .. 17. IX. 40, ()8, 97 

„ glacial . . . . 25, 27 

Silverhorn . . . . . . 03, 64 

Skipper's Ci'eek, flow of . . . . . . 13 

„ ,, gold-bearing veins of 59, 74 

„ „ gold-bearing veins of, cha- 

racteristics of . . 75 

„ „ Survey District . . 1, 54 

district, nature of mica-schist in . . 55 
„ gold-bearing lodes . . . . 5 

„ Gorge . . . . 94 

,, Gorge lode . . 94 

Point 11. 13. 20, 21. 28, 29, 32, 69, 73, 

75, 84, 86. 89. 92. 95, 96, 97 

Point and Shotover lodes 86-94 



,. antimony 

,, copper zone 

,. erratic 

„ Saddle .. 
Slickeasiding 

Slimes, gold-bearing, finely laminated struc- 
ture of 
Slippings, recent, along Queenstown and Ka- 

warau faults . . 
Slope-debris 
Sloj>e and crag . . 
Slope Hill 
Sludge-channels 
Snowberry 

Soho band of chlorite-schist 
Soho Fault 
Soho Junction . . 
Soho, Moimt 

Soho Stream II. 13. 2o, 23, 

Soho Survey District 
Sophorn If Ira pie ra 
South Canterbury, C'entiiil. rock-lx-nches in. 
South Island, differential elevation of, in |)ost 



95 
95 
29 
55 
94 

27 

21 

90 

34. 35 

34, 35 

73. 97 

1, 22 

56 

20 

50, 57 

. 3,8 

29, 56 

1, 54 

00 



41, 



42 
. . 98 
40 
25, 41, 42 
41 
95 
73 
19 
79 
38 



Miocene times 
Southland, export of limestone to 
,, ice-sheet which covered 

,, ]>lains 

Southern Al))s, valley-glaciers in 
Specular iron 
Sphene 

Staircase (!ullv . . 
Stanford, Mr. " . . 
Steel, bending and deformation of 
Stevenson's sluicing claim 28. 29. 67. 73, 89. !»0, 05 
lodes in.. 92,93 

St. Just, Mount . . . . . . . . 3, 9 

Stone Peak . . . . 10 

Stony Creek . . 12, 29. 57. 61. (i2. 63. 64, 96 

flow of . . . . 13 

,, fo.ssils at . . . . . . 66 

Stopes in Macetown Mines . . . . 77 

Slom-seiU . . . . . . . . 34 

Stratford, Warden . . . . 11 

Stream-glaciers . . . . . . . . 36 

Striae and striated surfaces . . . . 33 

Striated skin of erratics, exfoliation of . . 43 
Subalpine shrubs . . . . . . 21 

Subglacial rivers, constructive power of in 
newer Pleistocene . . . . . . 42 

Subglacial streams, removal of material by.. 36 
Subsidence during pluvial period . . . . 42 

,, main eaitse of recession of glaciers 42 



Summit glaciers 

Sunrise Lease Gold - mining Company (T 
mited) 

„ lode 

„ Mine 

„ system of lodes . . 
Swamps 

Sweden, harnessing water in 
Swiss giaciei-s, plalteii of . . 
Switzerland, harnessing water in . . 
Sylvia lode 



Page 
39. 41 



79 

.. 75 

77. 78, 79 

76 

73 

45 

.. 35 

45 

80 



27, 28, 
59, 

M.uiiototo 



29, 73. 
9(i, 



Table of formations 
Table of heights 
Taieri Flat 
Takitimu Series 

Tarns between roclie^ mniilonneen . 
Tc Anau Lake . . 
,, Series . . 
„ watershed 

Tea-tree 
Tectonic folding, absence of, in 

Series 
To Kerikeri 
Temperature-gradient 
Terrace-gravels . . 

,, as a source of gold 

,, of Shotover 

Terraces 

Tertiaries, escarpment of . . 
,, warping of . . 

Tertiary beds, age of 

,, thickness of 

Tertiary coal-meas\ires 

Tertiary sandstone, erratics of . . 26, 

Tertiary strata, wedge of, involved in Moon- 
light" Fault .. .. 21, 29. .56. 57, 96, 

" Theory of the Glaciers of Savoy " 
Thickening of Maniototo schists 

,, „ cause of 

Thicknes,s of ice-sheet 

Thomson, Mr. G M., F.L.S., analysis by 99, 
Thrust-planes in Maniototo Series 
-Till, glacial . . . . 26, 27. 32, 40, 71 

,. ,, origin of 
Tisbury, Chilmark stone of 
Timaru area, traces of glaciers in . . 
Tipperary Mine . . 13 

,, system of lodes 

,, -Premier system of lodes 

Titoki .. 
Totara 
Treble Cone 
Tree Island 
Triassic forms . . 
Tuff, calcareous 

Tuffs and breccia.s, green and red. as erratics . 
Tumatukuru 
Turrilella 
Tussock-land 
Tutu . . 
Twelve-mile Creek 

,, flow of 

Twenty-five-mile Creek 1, 10, 14 

,, flow of . . 

,, glacier in . . 

Twin-lakes . . . . . . 18, 

Twinning ... 
" Two-mile " . . 
Tyndall .. .. 16 

Tjnidall, Mount 



74, 77, 78 



SO. 81 



54 
23 
43 
60 
26 
60 
tiO 
8 
22 

.')() 
2 

42 
92 
97 
67 
73 
65 
65 
67 
66 
100 
28 

100 

36 

4 

4 

35 

loo 

.")(i 

, 72 

27 

35 

40 

. 79 

76 

, 97 



()8, 



63, 66. 



21, 

.. 61,62,64. 

19, 20, 28, 59 



53 
59 
74 
28 
22 
67 
21 
22 

100 
15 

,67 
15 
31 
51 
73 
2 
38 
9 



112 



U. 



Page 



Ulrich, Professor .. .. 71,83 

Unconformity between Kakanui and Wairoa 
Series . . . . . . . . (50 



Valley-glaciers . . 




25 


3G 


,, abrading power of . . 






39 


,, former great extension 


of. 


in 




New Zealand 






25 


„ two post-Pliocene advances 




41 


Valleys of Wakatipn region 






40 


„ rift-like, origin of. . 






10 


,, trunk, origin of . . 






11 


Vanguard Peak 






i, 9 


Vein, quartz 






7<) 


Vf.nvs . . 




' 03, 


m 


Veronica salicifolia 






22 


Victor Emmanuel Mine . . 




77, 


78 


,, No. 3 South lease 






78 


Volcano, Palaeozoic 






u7 


Von Glacier 




10, 


31 


Von Moraine 






30 


Von River 


ir 


, 30. 


31 



w. 



Waihola 

Waikawa stone 

VVaipara, absence of Pliocene beds south of 

Wairoa Series . . 

Wakatipu Basin, thickness of ice in 

district 

Fault 

Glacier .. 10,31,33,35 

,, direction of flow of 
„ upward flow of . . 



43 
35 
41 
60 

36,39 

100 

11 

40.67 
28 
28 



Page 

Wakatipu Lake. {See Lake Wakati))u.) 

,, region, erratics in . . . . 28 

,, ,, evidences of glaciat ion in. . 26 

Wakatipu Valley . . . . . . 8, 10 

,, pre-glacial in age . . 40 

Wakatipu -Wanaka region . . . . 41 

Wakefield, Captain E. G. . . . . 9 

Wakefield Range . . . . 8, 9, 10, 21 

„ formerly overridden by ice 35 

,, height of . . . . 8 

Wall movement, crushing of country rock by 75 
Walter Mountains . . . . . . 101 

Peak . . . . . . 2, 3, 10, 30 

Wanaka Lake, islands in . . . . . . 35 

Wanganui fossliferous Pliocene beds . . 41 

Warping of Tertiaries . . . . ()5. (id 

Water-power : future dominant motive power 45 
Water, erosive action of . . . . 3() 

Waters, Mr. D. B. . . . . 75, 87 

Water-supply . . . . . . . . 3, 5 

Weather-observations, imjiortance of . . 4() 

Wedge Point .. .. .. IS, ."il 

Welsh clay-slate . . . . . . 35 

West Coast, South Island, glaciers reached sea 
in Glacial Period . . . . . . 40 

Western lode (Shotover Consolidated Mine) 86. S7 
Westland, coastal terraces of . . . . 41 

,, forests of . . . . . . 45 

Westralia and New Zealand (iiiltl-ex]iloreis 
(Limited) . . . . . . . . 78 

Wilcox, Mr. William . . . . . . 7, 22 

Wild Irishman . . . . . . . . 22 

Wineberry . . . . . . . . 22 

Wynaad Company . . . . . . 79 



Zeta lode 
Zircon 



80, 82 
. 73 



By Authority : John Mackay, Government Printer, Wellington. — 1908. 



[1,250/9/08—10490 



75IG 



4 




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